I don't care about sketch apps, and I can't think of anything else where you'd actually want a stylus.
I don't want to have to use a stylus; I want to be able to use my phone just with my fingers (preferably one-handed). And I think the current success of many phones with capacitive touch screens shows that many people agree with me.
It's not stylus vs finger here. 90% of the time, I use my finger on the n900, but I really find the stylus handy for sketch, handwriting, etc apps. You don't have to give up good finer usability to support styluses.
...I don't want to have to use a stylus; I want to be able to use my phone just with my fingers (preferably one-handed). And I think the current success of many phones with capacitive touch screens shows that many people agree with me.