Yeah it is about support for windows & overall driver support.
I really like intel, I believe they are capable of great things, I really want them to be successful with video cards. Our current Duopoly is boring and sucks.
Again I would generally agree, except that in the case of Intel it is a mixed blessing as it is still the top dog in CPUs by a wide margin. And having so much power in CPUs always breeds possibilities for unfair practices against competitors in related markets.
Luckily that could change in the future. ARM/Apple as well as AMD seem to be in a good position to make it a fight on equal terms.
Not so good is that with TMSC a new near-monopoly underneath the CPU/GPU companies is emerging.