Well Microsoft has 90%+ of the market, even with the disaster that is Vista, even with everyone packing iPods and iPhones, Mac's share of the personal computer market can't be over 5%. So I suspect nothing is going to stop Microsoft.
We are on the path to convergence, telephones (if landlines still exist in 2019), video recorders, TVs aren't really distinct devices anymore and there will likely be one box in your house that provides your non-mobile phone, TV, game and internet needs.
