Reddit mentions of Blood Pressure Monitor Large LCD Display & Adjustable Wrist Cuff (5.31"-7.68") Automatic Accurate 90 12 Reading Memory for Home Use

But does it top this? https://www.amazon.com/Game-Keyboard-Controller-ASCII-Sammy/dp/B0000AFZRW

and this thing existed, so GC is covered.

Amazon link

It was mainly used for Phantasy Star Online.

Get this controller and paint it black and indigo :3

https://www.amazon.com/Game-Keyboard-Controller-ASCII-Sammy/dp/B0000AFZRW

This is the item in question.

http://www.amazon.com/Game-Cube-Keyboard-Controller-ASCII-Sammy/dp/B0000AFZRW

I think I might buy one soon.

If nothing else, it would open up a whole new market for peripherals. I use a wireless KB & optical mouse from my couch with Steam Link... and while it's not uncomfortable - it's not as compact and convenient as a controller. I think a more condensed WSAD pad (similar to the T9) which fits in one hand, coupled with a good stationary track ball could be extremely comfortable.

It may not occur to many people that having your hands so far apart could be comfortable. It seems unwieldy and unintuitive if you've never done it - but it really is extremely comfortable and you pick up on it almost immediately. I had one of those ASCII NGC Keyboards imported from Japan to use with PSO Ep I & II - which basically split the controller in twain and jammed a keyboard between the buttons. I thought it was going to be a pain to get used to, but really, it keeps your arms in a more natural resting state and reduces the angle your wrists have to extend.

I don't think it'll be nearly as much of an adjustment as people fear it will be, especially if devices are designed with the ergonomics of couch play (rather than desk play) in mind.

https://www.amazon.com/Game-Keyboard-Controller-ASCII-Sammy/dp/B0000AFZRW