that would be even greater 

720p is a huge turn off ...

Maybe next time Sony ...

If this was say $75 I would probably get it, but otherwise it should be 1080p and completely wireless.

The link has he full specs, brightness rating of 32 lumens. That's very little. To compare my projector for a 92" screen is rated at 1,100 lumens and at that size is only slightly brighter than your average cinema screen. Best suited for watching with minimal ambient light.

Now it's different tech of course, 3 lcd with color filters dims the 1,100 lumens considerably, yet you will still need a very dark room at 32 lumens. I also have an AAXA P1 LED pocket projector, fun toy, only 640x480 at 12 lumens. Anything above 40" becomes hard to see even in complete darkness. 1920x720 and over twice the brightness is a big step up, yet there's the pesky inverse square law. Doubling the screen diagonal needs 4 times the brightness. Still 65" in total darkness isn't bad for such a tiny device.

Their direct competition is $350, Celluon Picopro, exact same tech and specs.
http://www.amazon.com/Celluon-CEL-Pico2-B-PicoPro-Black/dp/B00TYG4LTC
http://www.projectorcentral.com/Celluon-PicoPro.htm

Here is a calculation tool for what you can expect to see at what distance
http://www.projectorcentral.com/Celluon-PicoPro-projection-calculator-pro.htm

The important number is image brightness, displayed in fl (foot-lambert). Cinema screens are usually calibrated at 14fl. Your home tv can go all the way up to 50fl. At 15" diagonal you're in bright lcd tv range. At 28" diagonal you reach 14fl with that projector, useful in low ambient light. At 40" you're already down to half as bright as a movie theater. At 60" 1/4 or a movie theater or 3fl, still visible in total darkness after your eyes adjust.

It's cool to have but promoting it can go up to 120" is false marketing imo. You need to have very good eyes and a high gain screen to see anything at that size. Anyway, add the Sony name on it, expect at least $400.

parity clause with microsoft 

hope this isnt more than 150$.

That was true one year ago. Nowadays they tend to come with a 1280x800 resolution. Still no full HD, but at least HD ready

$350

http://www.forbes.com/sites/insertcoin/2015/08/07/sonys-new-ps4-projector-costs-as-much-as-the-console/

Same as the competition then, no Sony name tax. Actually better since the Cellulon picopro is 1280x720, not 1920x720
It's a pretty nice price for new technology, 1280x800 pico projectors are rare and above $500 still.

It's a toy, not suited for big screen projection unless you want to sit in total darkness and then 60" is still about the max before you start to lose color definition. If you want to game on a projector you might as well spend $250 more and get something like The Optoma HD141X http://www.pcmag.com/article2/0,2817,2471858,00.asp It's a bit more expansive than a TV, but it can easily project 140 to 160 inches in ambient light.