Don't get too excited about the P3 until you find out what it's features are.
The only compelling improvement I see is maybe a zoom feature on the camera --- something modest like 10X. If they fixed the barrel distortion, that would be a nice touch. Maybe a slightly larger battery would also be a cool perk.
I'd sell my Vision+ on Ebay in a heartbeat (only had it for 3 weeks now) if the P3 features full 1080p video downlink, but given that Lightbridge system is currently at $1,400 then I think that's impossible.