I've skimmed the topic to the limit of my patience (I have warm food waiting), but I use my stylus a lot when surfing.

You can make an app finger-friendly, but designed-for-huge-screens-and-mice websites will not work. In addition to drawing, writing, ported apps, apps where multiple touch points are needed (like CAD, Untangle), office apps (move cursor between letters, choose a cell in a spreadsheet), as well as any app ever to actually need the screen space.

E.g., a spreadsheet app is dead if it can only display 12 cells, and then make room for menu, changing sheets, scrollbars, function editing window, etc. Graphs. Wizards.

Basically anything that's complex in UI needs small controls. And precision. And the ability to see what you click, not everything has a "You sure you want to click button 32? Not 31? Not 33?".

Get a mouse cursor that's 1/8 the size of your screen and where the actual touch point randomly jumps about half that, add some screen calibration errors and see how that works for your productivity.

My finger fits without touching about 5 times wide and 3+ times narrow side. This translates on my actual PC screen to 1920/5 (~400 px) and 1200/3.5 (~350 px).

This roughly the size of Maemo Org's quick reply box, arrowed down once.

I don't want that as my pointer, no matter what optimizations OS or apps have.

Already Maemo has widgets smaller than their close button. Already I close instead of drag.

And then there's the little issue of the finger never having a constant pressure point. It's easy to stay withing a 5 pixel long-press. With a finger, you drag. So you have a 30 pixel drag limit so now you can't drag a little.

I had a touch screen on my PC. Threw it away, now it's gathering dust in a corner. All of a sudden, my PC felt like it was 320x240 again.