The Vita needs software to do well though. It's not gonna go anywhere if devs don't support it. Sony is probably moneyhatting R* to at least get a GTA spinoff game on the Vita.
The Vita will sell when the software is there. GTA would be a huge part of it just like it was on PSP.
Core i5 2500K @ 4.8 GHz || 16 GBs 1600 MHz DDR3 || Saphire Radeon HD 7970 || Dual 128 GB SSDs