Left is right

Listening to an older Austrian lady (AUT) who speaks very little English and a young woman from New Zealand (NZ) making conversation about what side of the road cars drive on:
AUT: "You drive on left side."
NZ: "Right."
AUT: "Right? You drive on right side?"
NZ: "No, left. You also drive on the left side, right?"
AUT: "Yes, right."
NZ: "So left."
AUT: "No. Right."

Typing on the way

So yesterday while I was on a trip to a museum I thought that it would be awesome to have some gadget to take notes with. A laptop is of course best, but it's annoying to carry around all day. A smartphone is okayish, but typing on it does suck a fair bit. A good old pen & paper notebook is hard to digitize later, not to mention that it's also somewhat bulky.

So here's my wacky idea for a much better device: It basically looks like a watch and you wear it on your wrist, but it has the ability to project a keyboard into thin air right in front of your hands. Gyrosensors inside it adjust the position of the projected keyboard to compensate for your wrist movements. In addition, it projects just a very low resolution screen with two or three lines; Just enough to see the text you enter.

Then it allows you to start typing on that projected keyboard. It tracks the movement of your fingers using a camera, and turns the information into key stokes to type your text.

All the calculating power and memory for it is inside a small chip within that watch; Besides the projecting and the video recognition (which aren't small tasks, I admit) you don't need much, only a simple text editor. (Well, you can give the emacsians their shortcuts, if you want.)

The data can later be transmitted to a normal computer using for example Bluetooth or NFC.

Any thoughts on that one?

(Crossposting from Google+.)