This is a box that takes cable input and then distributes over your internal network to various network devices.
So that for instance you can watch anything on say Comcast from your iPad 2 or from your Windows PC. Sadly these appear to be the only devices supported right now.
So if I wanted to use it I would have to boot Windows 7 (whatever version) and run the media center on there. If I were to put Mac Minis next to each Tv, then I could get rid of the various Tivos that are there now. Plus watch from any iPad. Pretty cool!
Sadly it won’t run say encrypted stations on MythTv on the Mac for security reasons, but you can watch unencrypted on MythTv for the Mac