And windows machine can run steam OS just be warned that the steam OS erasers all the data off the HDD including the OS installed.
I think that what I read if anyone wants to correct me not sure I read this information a month ago.
But yeah I think you can dual boot for Windows or whatever OS you want to use.
I have been following this SteamOS box thing for a while now, from the first announcement. I do think of myself as a pretty hardcore gamer, I play consoles, PC, portable and phone games. I can not get enough. It's like my crack...
I know where Valve is trying to go here and I see their point but, I don't think the market is ready and there are a LOT of flaws with their plans. They are trying to get the PC gaming market in the living room, taking the PC from the office/bedroom to the living room for everyone to enjoy. Here is my list of MAJOR flaws with this.
1. WAY too much fragmentation before it's even on the market, with the announcements of some SteamOS boxes going for $499.99 to $5999.99 there is WAY to much room for fragmentation here.
2. Single use PC, Yea, buy a $1200(a step up model) gaming PC and it's only use would be for games, No home theater PC or desktop web browsing.
3. Linux based OS in the Steambox, Most of Steam's library is for Windows, so your not talking a HUGE library of games for it to start, all games have to be re-written for Linux, so classics might not show up and new games might get delayed because a Dev only wants to work with Windows.
4. Limited life span over what a X1 or PS4 will offer (PCs need to be upgraded every year or two to be able to play the newest games at MAX level, if you don't in 2-4 years, there will be games you can't even play because of the hardware).
If you have the money to blow (I would not suggest any of the entry models if your going to do this), it's a nice option but, It's got some major flaws. Also to think, They make a steam front end for Windows, build a home theater PC, put a nice video card in, put steam front end on it and it will cost you almost 1/2 AND you have a LOT larger library to chose from.
If you have a gaming PC now (like I do), this is one of those things, Wait and see but, I don't think it's really going to go anywhere, too much to confuse people at this point, and the Nitch gamer is not going to keep this project afloat...