Red_Avatar: Only an idiot would think Valve could do this so only an idiot would believe what they're saying has any real value. In reality, they'd get sued to hell if they even TRIED making all those games work without Steam. In reality, you'd simply lose them all.
Kabuto: A simple that's incorrect usually does the trick. Do you somehow feel superior by broadcasting how I'm such an idiot twice in the same sentence no less?
It's also not out of the question valve could possibly negotiate with major partners if whether they would truly care if the drm is stripped well well well past its main selling window.
There are four ways that could all turn out.
1) Valve say "oh sorry" or just say nothing at all and never patch the requirement out, due to lawyers or whatever else telling them not to.
2) The "patch" is only for Valve games, due to not getting permission ahead of time for anything else.
3) Permission to do this is in every Steamworks game contract and Valve "patch" only Steamworks games.
4) Permission to do this is in every Steam publisher contract and every game sold through the service is "patched."
Of the four I would bet number one, the total customer screw, is the most likely. I don't say that as a Valve "hater" or Steam "basher," it's just common for companies to say one thing and then when the shit hits the fan they can't follow through. If Steam goes down that likely means Valve is going down and the lawyers or piecemeal buyers would be able to stop them from doing whatever they wanted. I guess what I am saying is you just can't count on such a thing, and their terms of service guarantees no such thing. It is possible though, of course.
I don't worry too much about it honestly, people are always there to make sure the games of the past are still playable. If Valve doesn't do it then others will (and already have, really).