The only reason Android has been about rooting and custom roms is because the core OS has been quite crappy up til now.. and the mannfacturer UI's have been dull and not intuitive or simple... this is all moving along rather quickly now and the core OS is significantly better.. close to full dual/ multicore processor support and the UI's are getting better, more friendly..
99% of users won't want to root and install custom ROM's when the preinstalled ones work.. and work really well.... the magic of Android is that there will be lots of UI's to choose from so there'll be plenty to cater for differing tastes.. and you can customise your phone loads anyway, before you get to rooting it..
- Samsung Tocco; SE Xperia X10; Sony Ericsson Xperia Pro; SE Xperia arc -Bootloader UNLOCKED
- Sony Xperia T - Stock.. for once!
- Sony Tablet S - SGPT111GB/S - looking to upgrade to something decent!