Some of the best software released are just ports, unfortunately. The ports are of incredibly good quality, however, and really shine on the hardware. Having a platformer like Rayman Origins on a portable looking as good as it does is really phenomenal. The two big fighters at launch were nigh on perfect ports of the HD games and really shine on Vita. The fact that something like Ninja Gaiden can exist on a handheld (and is one of the best games ever made for XBOX) is impressive as well. Virtua Tennis 4 is another outstanding achievement. Ports don't sell hardware, though, so those are the types of games you might get into once you own the system.
Many of the other titles are new games in series that already exist as well. Uncharted is great, but not quite on par with the last two PS3 games. Wipeout 2048 is one of the best installments in that series to date, but Wipeout isn't exactly mainstream. Same deal with Super Stardust, Lumines, and Mutant Blobs. They could be considered the best entries in those series but they really aren't that big of a deal to the game buying public.
There are plenty of other solid but not necessary big titles like Motorstorm RC, Escape Plan, Fifa, Hot Shots, and Unit 13.
I suppose the main problem is that there are a lot of really good games available for the system but nothing really BIG that could move hardware. The Vita has a lot of good to great games available with very little crap, but nothing that would push people to buy one.
I think it's much better off at launch than the 3DS was for the first 6 months of its life but it's competing against 3DS of 2012. Still, I own nearly as many Vita games as I do 3DS games but I recognize that my tastes don't jive with the general public at large.
