Which is exactly why opensourcing maemo code could change a few things. Once we get ARM (with erratas) working, all future processors are a go (or is ARM going anywhere?). Sure drivers are the limiting factor, but once they are the ONLY limiting factor maemo on any hardware can be a reality. Things in mobile world do not change from atari to amiga to pc all the time. Tegras etc will be a problem, still paying for reveng of drivers would be much less costly than expecting whole system on each and every device (also upstream all reveng'es to linux kernel and more people will join this community, no?)