1) Depends on a couple of things. a) Can the device do both H.323 and H.264 protocol transmissions? If yes, then it probably can. If not, then most, if not all, VRS players will have to upgrade their servers and desktops to accept H.264. That's not an easy or quick task to do. They will probably have to wait 6 months to do that.
2) See above. DVC-1000 and VP-100 only advertise H.323 protocol on their devices. In order to upgrade to H.264, you have to change the hardware inside. It is not able to be done downloading an automatic software upgrade. Sorry.
3) From what I see of every ad for the Ojo, NO. The screen is too small to see if you move back, and the person can't see your arms if you stay close enough to see.
The Ojo screen is 6-by-3.5-inches. That includes the "self view" portion of the program. Every single review I saw had a picture of the Ojo without a self view while mentioning the '6" x 3.5" screen.'
If you have a tiny TV screen, like 13", you're still getting close to 9" x 9", and even with the videophone program taking up some screen space, you still have plenty of room for video.
What's missing on the discussion here is that THERE IS A MONTHLY FEE for using Ojo. $14.95 a month. What?! Other videophones are free!