The thing I'll be interested to see is the price.
Just recently I found an LED projector.. a standalone unit, as an alternative to the other types of video projectors out there. ; It's less expensive, can be battery powered, and should have an extremely long life time with no bulb changes being needed (which seem to be close to half the cost of a projector, the bulb itself I mean). ; It also is apparently only useful in darkened rooms, though, and is lower resolution than the better projectors.
I think this unit was about $300. ; I can't imagine that Nikon just tacked $300 on to the price tag of a P&S in order to add this functionality in. ; I'll be interested to see if they've been able to do this with at least reasonable quality while still keeping the price premium in check.
I actually do want the projector, but mostly as a novelty. ; Let's face it, my laptop has a 1920x1200 screen. ; Why on Earth would I want to project a 640x480 image onto a wall instead?
The answer is for fun. ; Or as a prop for Halloween, I'm thinking I could use it to project light through fog to create a sort of pseudo hologram look. ; Or I could project it onto the side of the fog in a manner kind of like the water fans used in Fantasmic.
I'll tell you what the Iphone needs.. a hologram keyboard. ; And before you guys think I'm joking..
http://www.virtual-laser-keyboard.com/
There is such a thing. ; It's not exactly a hologram, but still it's a neat gimmick. ; I don't know how useful it really is, but I'd love to get my hands on one to see what it's like.