Now, le'see... if you lose case-sensitivity and text-based displays, rewrite the DOS so that it's "Englishy." Add volumes, assigns, datatypes. Replace the swap partition with a ram disk. Put it all together in an easy to understand way... yea, then maybe Linux might feel like AmigaOS... maybe...
If they think of a whole new approach to gui's (think of perspectives, like work, internet+music, gaming, 'console-gaming', with each their configurations), standardized ways how programs communicate with each other, and program configurations should be standardized (with for instance xml/xsd). There is a lot to be done in OS land, pity many ict folks are conservative and only think in bouncy animated windows and cr*p like that.