I play in a B/X campaign right now, and aside from old edition .pdf's (back when they were available) have bought two, maybe three, new D&D products from the license holder of the D&D brand over the last 15 or so years. I do, however, frequently purchase new rpg materials, for D&D-ish clones and otherwise, and continue to go to cons.
TSR lost me in the mid-90s and WotC hasn't really done anything to get me back. I disliked 3.x e. I don't dislike 4e so much as it holds no interest for me whatsoever. I think I've come to the realization that I'm never going to buy another multi-volume, multi-hundred pages of core rules type rpg ever again, and as long as that is what the D&D brand is, I won't be a D&D customer.
I would have no compunctions whatsoever in giving WotC some of my rpg'ing money if they were to produce gaming products that I liked -- I've certainly done so in the past with Magic, Everway, and Heroscape. I think they're a good company. It's just that their take on D&D has generally been the polar opposite of what I want out of a D&D game.
If they were to produce a product that was compatible with or was in the spirit of the D&D of 1974 to 1982-ish, I'd certainly give it a look. But as it is, I'm not sure they can aim to get players like me back into the fold without either alienating their current customer base or producing multiple systems.
So, I guess all of that is to say that a new edition of D&D that came anywhere near my preferred play style would be neat, but I'm not exactly holding my breath.