WAAAAAHHHHHH The race to the bottom has sure made a lot of people whiney about what an app is worth. If you don't get 99 cents of fun out of it don't buy it. If you don't get 4.99 of fun out of it don't buy it. It takes more resources and recoding to make it for iPad and in HD. Not alot but enough.
What? Loads of apps I buy are universal so I don't see why Angry Birds isn't, other than them wanting to make more money by effectively making 2 apps out of what could be 1?