It's more that knowing Nintendo is available to them now on pc (which previously they weren't because they didn't want a ps/xbox AND a Wii U), would that cause even diehard microsoft/sony exclusive fans to be like "nope, these few exclusives that sony/microsoft provide aren't worth buying a console for, i'll stick with multiplats and Nintendo on pc"

I'd have no need for a console if Nintendo released games on PC. Also, anyone claiming that you need a 'gaming rig' to game on a pc is full of it. There are certainly some games that need a decent rig, but there is a vast amount of gaming content available that doesn't. Nintendo games don't need much power and I don't think that would change if they were developing for pc.

Considering PS4 and Xbone are less consoles than faux-PCs (with the next gen to surely blur the lines between console and PC to the point of nondifferentiation), without a "console" experience at all there'd be no point in choosing one over a PC.

That's without looking at the Nintendo games that would be on PC in this scenario. So I'd definitely be a PC-only gamer. I may play on friend/family consoles if they had them for exclusives, but wouldn't go out of my way to get them.

^^^

'these few exclusives aren't worth buying a console for' - thats what people think about wii U, and depending on how optimised their games would hypothetically be on PC, people who are not investing in a wii U also wouldnt invest in a PC upgrade for nintendo exclusives.