Cerin wrote:What doubts have you had about the technology?
Since you ask: It seems to me that the device essentially "films" your fingers, so in order to type, it must be able to see each finger touch the surface, and do so quickly enough to keep up with your typing speed. I can only imagine that it works by not actually looking at your fingers but rather at what part of the projected keyboard image is being blocked by your fingers.
Obviously, there must be a lot more to it than just that, but for simplicity's sake, let's just assume that is all. I think such technology is easy to make, if it's only required to follow a single finger typing one key at a time, at maybe up to two characters per second.
If you would like to use a two-finger combo like Ctrl-C (copy) only using your left hand, chances are the camera wouldn't even see
you pressing Ctrl because your hand and other fingers are in the way.
To compare: at least the TS can feel the touch on the surface. Granted, the TS also has trouble with such two-finger combos unless you do it a lot slower than on a regular keyboard.
It's a fact for most of us that the typing speed on a TS is less than 80% of our speed on a normal keyboard, and the error rate is higher due to lack of touch feedback. I can't imagine that the typing speed of a virtual keyboard can reach anywhere near the values of a TS, not to mention the speed on a normal keyboard.
Okay, the reason for using a not-normal keyboard is often RSI, so there's no real use in comparing with a normal keyboard. But still, there are other factors like how annoying it is when it doesn't recognize or misinterprets your entries, as well as simply whether your general writing speed is enough to satisfy your needs. -- These things are a very real reason why I love my TS but some/much of the time I actually use a normal keyboard after all! It's just faster and I'm too impatient, though at the same time I sorely miss the gestures of the FW devices.
I'd be rightly impressed if you can tell me that a virtual keyboard can match the TS (leaving aside the gestures, of course). So if or when you're able to write us a review, please do!