Win8 is an attempted hybrid. You might like it on your mobile, but probably 95-98% of those who've used it on PCs hate it..., no actually loath it. Win8 is providing the perfect environment for another major player to come in and challenge MS's operating system for PC.
Why doesn't Microsoft support the gaming side?
Why doesn't Microsoft properly support PC machines with their OS? Why are they attempting to make PCs into oversized mobiles? Why aren't they listening to the consumers who don't want this?
Why? Because Microsoft is dominant, and knows best, and you have to get into line with what Microsoft wants. Mircosoft is Macrohard, and their eardrums are granite. This is why.