Who has a Google Glass? Imagine the perfect wearable keyboard?

[menuhin]

I have been following a bit the news of technologies in wearable computing.

Has someone here tried out the Google Glass?
It is for sure voice-command based.

Can there be a capable mobile / wearable keyboard that pairs well with it? That at least does not need a solid platform to hold the input device when one uses it.
Here are some candidates:
A wrist keyboard


Matias's Half Keyboard


Gest (a dead KickStarter project)

[hking0036]

 )

Never tried Glass, but I doubt there's a good keyboard solution for that. As much as I hate virtual keyboards, I don't think there's a really solid solution for physical keyboards to carry around outside of 60% which is still far from portable. I think the next best thing would to have a phone tie-in like all the watches have.