I think this is going to be bigger than some people on here seem to think. 3D is very popular at the minute as cinema releases have proven. It is already receiving huge backing from electronics manufacturers and hollywood studies and now broadcasters and game developers are following suite. It is being adopted by industry far quicker than HD was and I expect adoption rates in the home will also likely be faster than they were for HD. After all, this isn't just a resolution upgrade which some people 'claim' they can't see it's a completely new feature in home entertainment. I think Sony are really going to push this as it could become a great selling point for the PS3 and extend it's lifespan (as Natal should for the 360).

And paranormal activity made a billion trillion jagillion dollars at the box office..

I second this

Paranormal Activity only made about 108 million at the boxoffice (http://boxofficemojo.com/movies/?id=paranormalactivity.htm).  And Part 2 will probably be in 3d.

That's true but think 5 years down the line when 3D capable tv's become much more affordable and people have had their HD tv's for a while. If the PS3 is still on the market, which I expect it will be, it will likely also be at a very affordable price and so could potentially become a fantastic entry model console for 3D gaming for families. I agree that it is unlikely to have a major short term impact but it could prove very successful in the long run.

And paranormal activity was made with a small budget by a unknown director compared to avatar...

and brought in like 600x what it cost to make... Can Avatar say the same?

I predict at least one million sales of the 3d version of Avatar by next Christmas, so that would be 1 million 3d tvs in homes by the end of 2010. Also, a lot of people have held off on getting hdtvs. So people that might be thinking of getting an hdtv in 2010 might decide to go with a cheaper 3d tv instead.

avatar looks fantistic in 3d imo, so even if the ps3 wont get alot of 3d games i would be satisfied with 3d movies

for all the naysayers;
You sound incredibly close minded.
We know almost nothing as far as what exactly Sony is planning.

They could be focusing on 3D in a much larger way than you can possibly imagine for all we know. 3D could come out and work with any tv through some upscaling process as described for the 360..

who knows, but I for one am looking forward to 3D with optimism!

     It doesn't matter if Avatar can do the same because all it means is that the makers of Paranormal Activity will take some of those profits and put them towards more expensive effects and probably try to take advantage of the popularity of 3d with Paranormal Activity 2 to try to further its appeal.  And there you have it Paranormal Activity 2 another selling point for 3d tvs.