NOTE: IMPORTANT WARNING! It takes over your whole hard disk it does NOT install as dual boot with your existing OS at this time. So don't try to install on a machine that you are going to use for anything else. Hopefully the final version will be dual boot friendly.
Yikes, that is not cool. Hmmmm. I wonder if the following would work:
1. I unhooked my current hard drive from the system.
2. Install my older HD I have setting in my closet and install the Steam OS on that.
3. Reconnect my current hard drive with Win 7 OS installed after Steam OS is installed.
I guess my question is rather on not the Steam OS will Nuke Win 7 once it sees the drive connected to the system? If it does, then Steam OS as is will flop. No one will want Steam OS if it doesn't dual boot. I can't believe that this wasn't the first thing on the list.