Almost as good a read as this and just as reliable as this. You ought to know better by now.
The post on the least-reliable-website-in-the-world contains information on the Wednesday and Friday updates to Valve's website. In just a couple hours, if the website reveals the Steambox reference specs, you may want to go read that 4chan post.
I think the guy in that 4chan thread probably has the hardware predictions right, but I still doubt the last announcement is going to be a source 2 + game announcement. I'd be glad to be wrong on this though, but looking at the text on the count down page doesn't really bare it out. I still think that last line will be the focus of the last announcement; "Soon, we’ll be adding you to our design process, so that you can help us shape the future of Steam."
The glyph on the last circle kinda goes along with it too, the two little circles joined by a plus sign could signify something like: Our Steam plus your Steam. Gabe has hinted in the past that they want to revamp Green Light to get rid of the bottle neck and allow designers to market their new games more directly to the users + also perhaps let users come up with their own custom version of the Steam store that they personalize themselves. My guesses on that is an expansion of the recommendations feature into a full page custom version of the Steam store as a tab on each users profile that they can customize to feature their favorite games and their own reviews, perhaps even earning a tiny commision when someone buys a game through their page, sort of like an Amazon referal program kinda setup. Also Developers will also be able to have their own store front like pages as well that they can customize as they desire to best showcase their own games.
Because if Steam becomes the defacto standard for Linux games, then we'll forget to see propietary Linux games DRM-free (as it happend until now).
Eh, no. Valve doesn't force any game publishers to use DRM, it's an optional component they provide named CEG.
The choice to use DRM on Steam is entirely up to the game creator/publisher, lots of indie games like Binding of Isaac, Super Crate Box, Super Meat Boy etc are DRM-free on Steam as they decided not to use the DRM component. You can play these without Steam running, copy them where you want on your harddrive, back them up etc.
So if you don't want publishers to opt for DRM on Steam, vote with your wallet and buy DRM free games.
The Green Light overhaul portion of my above prediction is a bit harder to pin down as there are a variety of ways they can approach it, but I tend to envision something of a melding of Green Light and Early Access where Green Light becomes something of a beta sales program in a way, where we can buy games, or perhaps download demos, to try them out and vote whether or not we want to see the game go into the mainstream Steam store. Basically making Green Light something of a secondary lower tier store with less exposure than the main Steam store and the acknowledgement that those games haven't been fully vetted yet. People who are feeling like taking a risk or supporting a projects they are already supporting outside of Steam can come in and vote with their wallets to decide if that game is worthy of being in the big leagues so to speak.
[Edit: This could also explain why they recently made it easier for developers who haven't been greenlit yet to access the Steamworks SDK.]
I am not familiar with Steam. I use Playonlinux to play League of Legends, which currently is quite experimental.
So my hope is that Valves effort leads to better gaming experience on Linux in general. That means more games, and more stable gaming, less crashes.