Fair enough, but those games are the reason people buy a dedicated gaming handheld. Gamers want a little more than Peggle or Angry Birds.
You've described my situation exactly. While I like Angry Birds, there are times I want more. I bought Madden for the Ipad and I personally found it impossible to control using the touchscreen interface.
And in the case of handhelds, Nintendo by and large doesn't make the kind of games I want. So that's why I went with a Vita. I really liked my PSP when I had it but became a little frustrated at hte lack of a second analog stick. Since I bitched about that for years, I almost felt obligated to get the Vita now that Sony FINALLY got it right with the controls.