Cold Light on 10 March 2012
These graphs are more representative. Anyway Vita had an ok start, especially with far stronger competition on this market than in 2004 and other conditions like expensive memory cards and only two really mass-appealing games: Uncharted and FIFA, but it will steadily falling up until some big releases/announcements and things like price cut in foreseeable future. But this thing isn't "doomed" and will perform well over its lifetime alongside 3DS, I'm sure. And upcoming E3 is going to be really hot for Vita as well as for everything else - we are coming closer to the next generation after all.
