@nthn, I agree with everything you say except the "running desktop applications on a mobile" thing. I regularly ran desktop apps on my N900. You just take random sources, type "make" and voilà. I also ran them pre-built under Easy Debian, although I admit that some are more suitable than others.

But that was the N900. That was special. Most mobiles are indeed very poor targets for running desktop apps. Not "due to physical size constraints" - some are really massive by anyone's standard (except perhaps Dav999 and gerbick) and, thanks to the nonsensical pixel wars, have screen resolutions four times higher than any desktop. No, the real reason why they are not suitable for running desktop apps is a) no physical keyboard and b) capacitive touchscreen without a stylus.