Can't say how good they are, but PSN has some great looking games. The PixelJunk games, The Last Guy, fl0w, Flower, Pain, etc. all look superb.
XBLA, on the other hand, has scads more games but also more of a quantity over quality feel. Although quantity IS a quality, so... hm. Still, for every Frogger 2 and Coffeetime Crosswords, there's an Ikaruga and Castle Crashers.
All in all, I do sort of wish Microsoft would be more thoughtful with their downloadable games. I think Sony's done a good job with that so far.







