How about a phone that conveniently sits on your wrist? Alexey Chugunnikov has designed the Rollerphone concept and hopes that one day it becomes a reality. It is a wearable cell phone that looks like a wristwatch.

The Rollerphone has a retractable transparent screen at the base, so when you get a call, just pull out the screen. It features a media center, so you can watch videos, chat online, play games, read e-books and more. It will also project the time. One day this will be practical, but for now it is just a concept.

Remember the iKey AK-39 military-grade wrist keyboard? It was a small keyboard made for a soldier to wear on his or her wrist in order to manipulate a rugged, portable computer.

Now iKey has a new keypad, and it’s an OEM product meant to integrate directly with wrist-worn computers. The 17-key keypad “functions just like a cellular phone does when texting”. It also sports an integrated pointing device, dedicated mouse-click button, and an Enter key.

iKey is known for their rugged keyboards, but they’ve outdone themselves with the new AK-39 wearable keyboard. It’s made primarily for military use and conforms to full MIL-461 standards. With this keyboard on your wrist you’ll be good to go in environments with harsh electromagnetic interference and it’s also designed to be used with a glove in either left or right-hand configurations.

The keyboard is a basic 39-key layout, with an integrated pointing device that uses Force Sensing Resistor (or FSR) technology, with adjustable green backlighting that is compatible with night vision. We have no info on pricing, but you probably can’t afford it anyway.

Garmin makes GPS devices for just about every possible need. You can get a Garmin GPS for your car, you can get Garmin GPS in your airplane, and you can get Garmin GPS for your motorcycle. You can even get Garmin GPS for your wrist.

Gaming has announced two new wrist wearable GPS units called the Foretrex 401 and Foretrex 301. Both of the devices have high-sensitivity; WAAS-enabled GPS receivers and a USB interface in a waterproof device designed for skiers, campers, and military personnel to wear.

If you have trouble telling the truth and everyone around you knows it, you may find yourself wearing this wristband one day soon. The Truth Wristband Kit costs $45 and is a wearable lie detector type device.

It measures your galvanic skin response, which is a marker used in lie detector tests to determine truthfulness. The lights turn from blue to red depending on the users truthfulness. It’s a pretty easy project should you have a worthy subject to test it on.

Check out this wrist-worn PC, if you’re looking for something slightly Sci-Fi and nerdy. It’s the ultimate ultraportable. From Glacier Computer, the Ridgeline W200 is a wearable version of the company’s Ridgeline, which can usually be found in your vehicle. The case is rugged, light weight magnesium alloy and it weighs in at 10.2 ounces with a 3.5-inch color display, touch screen, backlit keypad, and a swappable battery pack.

You’ll also get support for Wi-Fi, Bluetooth, and GPS modules. It comes with Windows CE or Linux, sporting features like tilt and silent reckoning for putting the device in standby.

Flexible OLED displays are becoming more commonplace everyday. They just need to make it into some of the devices we can buy. However long it may take, when that day arrives, Universal Display Corporation thinks something like the gadget above will be a part of it.

It’s a wearable, flexible, 4-inch prototype screen that CES attendees will be able to drool over, maybe even wipe clean and try on. Just don’t expect to wear it comfortably. It won’t be in stores anytime soon either. This one was developed with military applications in mind, but bendy consumer devices are on the way at some point. Give it a few years and we will start seeing them in passports, clothing, packaging etc.

The iPod pretty much owns the day in the world of MP3 players, but that doesn’t mean they can’t give it a drastic upgrade in the future. Designer Gopinath Prasana prefers a wearable player and so created the iBangle concept. Wearing it is better then carrying an extra gadget after all.

This MP3 player is in the form of a bracelet or bangle, hence the name. It features a multi-touch track pad so you can control your playlist. It’s pretty small, so you won’t be watching videos or movies, making this like the iPod shuffle. Since everyone has different wrist sizes, the iBangle adjusts by inflating a cushion so it will fit snugly.

Turtle Wireless, a provider of “novelty wireless accessories and phones” is indeed unveiling one such new novelty phone. It is a wearable mobile phone watch known as the TW801 and pricing is set for around $250.

The Turtle Wireless TW801 is a GSM mobile phone watch which has WAP/GPRS compatibility and built-in Bluetooth. It is designed to be worn like a wristwatch and sports a touchscreen design for interactions with it.

It’s not exactly a glove and I don’t know if I’d classify it as a watch either, but it is something new that will be shown off at the Wearables Technologies Congress in Munich, Germany this month. This exercise gadget is like a second skin according to Beurer, the makers of the device. It wears on your wrist and hand similar to a glove and monitors your pulse without the need for a chest belt like most heart rate monitors.

Instead of reading the electric pulses from your heart, this this pulse …