Have you considered making Semantic Web technology part of the OS? I think that would be a real chance to make a difference to other operating systems, and would open up a wide variety of new possibilities.
Semantic Web http://www.google.com/search?hl=en&c2coff=1&q="semantic+web&btnG=Suche&lr=
Semantic Desktop
http://www.google.com/search?hl=en&q="semantic+desktop"&btnG=Google-Suche&meta=