Indeed!

It really depends on what the device is designed for.

If it is something like the n900 then a resistor-type screen makes sense - the n900 is more for general use, some of the applications need more accuracy (e.g. vncviewer) - you really need a stylus to get the most out of it.

If you are talking about something like iPhone then a capacitor-type screen makes sense - the iPhone is more like an entertainment device and needs to be more accessable.

E.g. You can use finger, stump or body-part not under restraints (e.g. use nose when you are secured in strait jacket shouting "Steve Jobs is the messiah all hail the iPhone!")