At around $10 bucks a pop, PSN (and I'm sure XBox arcade as well) games replace major studio polish with good old fashioned fun. Paying $60 for a blockbuster title with a lot of glitz but retarded controls and boring gameplay is hopefully the kind of thing a down economy is going to weed out.
Despite the $50 down payment, and whatever you might feel about MMO's, they oftentimes have WAY more content then their counterparts and if they are addictively fun can easily be one of the better gaming deals. When I was playing WoW that was $15/mo. for my gaming habit and that was it. In time between WoW I'll easily buy two games per month, and then some Indie games, which starts adding up fast, and for the most part they aren't even as fun as WoW is. (However I must say, with full disclosure, I only played WotLK for a couple day before going back to WAR, which I eventually quit, so that was mostly 40-something bucks down the drain.)
(I'd like to give a quick plug for Champions Online which I played compulsively all Labor Day weekend and was great fun. At least the early game content is every bit as addicting and fun as WoW. I hope it holds up over the months and if it does it would be a very suitable filler until SC2 or Cataclysm comes out, whichever comes first.)
Anyway that is my two cents for cheaper gaming. Experience has forced me to become very leery of the block buster releases which, if I can, I hold off and only buy it if people are still talking about it a few months later.