I would really love to see them rewrite Windows on a unix or linux core the way Mac did with Mac Os X. Having the software industry unified on a unix standard

I would really love to see them rewrite Windows on a unix or linux core the way Mac did with Mac Os X. Having the software industry unified on a unix standard would be amazing. It would free up so much development effort currently spent making things cross platform (not all of it, but a lot of it).