Being a vita owner here in Japan and by talking to my friends, basically a lot of the titles are cheaper downloadable and thats what a lot of people are doing.. but yeah hardware sales were kinda low. the wifi series is sold out around me (only checked 4-5 non major stores) but the 3g models are still around.
Most people are waiting around for Gravity, which a demo released today and everybody seemed to be pretty happy with.
Uncharted was pretty fun (better than 3) in my opinion, but yeah none of the games are a game that everybody "must have."
I think its weird because they have a lot of titles and everyone has the title they like, rather than everybody like "oh shit mario!" and jumping to go buy it, everybody kinda has their own title they want and they buy that, no big majority.