I really loved HZD on PS4. Seeing it come to PC is great! Very exciting! A lot of people who missed out on the game will be able to play it now.
However, I don't plan to buy a second copy of the game. PC modders could change that, however. I'm eager to see what the modding potential is for HZD and what sort of creative community forms around it, if any. I'll buy another copy if and only if some mods justify it.
This is great. And even if Microsoft owns Windows, I don't think that is a big deal. If they sell Horizon on the Epic store for example, they are only losing a small amount to Epic, and Microsoft doesn't make anything at all. Windows is still an open platform.