I think it will be better to wait for games which were designed for stereoscopic 3D support before coming to conclusions. The first few games to support this are some older PS3 games which aren't optimised nor designed for this. Future games will certainly show better results.
But I think having this option for these games is a nice addition for people with 3DTVs in the future who already own a PS3 and these games today.
However I think Super Stardust HD will be a good cheap launch title worthy of buying for its 3D support, the coders are top notch and probably their engine will see a good optimised overhaul.







