I had a DS 2 weeks after release and a psp on launch day, I only play RPGs. Half a year later still didn't have a game worth playing on either of them, Couldn't play the GBA ones I had either as the sound on many of them was scratchy. The only reason to get a system on launch day is if buying a Sony system due to the way that later versions usually have dropped features. If you bought either of the current gen systems on day 1 you could have only come out on top with a Wii. I pray to god that you didn't early adopt the Nokia N-Gage.

Usually on launch day there are one or two games worth playing IF they are in the genres you like, a few remakes of last gen stuff, and mostly rushed crap. I doubt we'll see another blowout launch like the Dreamcast ever again, if for no other reason than the fact that the Dreamcast would be on life support within a year.