I think there are a few jumbled up 'sides' in this debate... mostly because of the current technology limitation and current product associations in the market, for better or worse.

IMHO, the main opposing camps are:

Finger friendly vs Stylus-centric

- Capacitive screens can only cater to finger-friendly UI implementations.
- (Recent?) Resistive screens can cater to both, as can be seen on the N900.
- Finger UI usually accompanied with multi-touch gestures, which resistive screens can't provide.

From all those variables above, the main players have made their own (still evolving) implementations.