There is a debate? I thought it was generally accepted that styluses are icky.
There are a few apps I use that benefit from styluses, such as Penultimate (and probably Paper, if I could get over their obscene pricing scheme) but the capacitive stylus I have is really lame and I hate using my finger as a pen.
I'm not surprised iPhone/iPad apps are moving in this direction, but it still feels like being nickel-and-dimed.