I don't think so. Steam deals are good but since you can't sell the games back or trade them the games become worthless after you beat them or lose interest in playing them. Its nice getting games for 50-75% off through steam but honestly I value PC games a lot less than console games since like I said they are worthless once you beat them(XBLA and PSN games also have this same issue). The only way I would buy a PC game would be if its at least 50% off.
I've been a gamefly member for years now and imo that is way better than any steam deal. Without any special deals or anything you can get gamefly for a year for around $190 and with just that you could play all the games you want for every console for a year.
In the future I think we will see more things like Gamefly and PSN Plus for consoles because the whole pay one monthly or yearly fee for access to a large selection of games for free is much better than sales on individual games.