so how can I strem my computer screen to another computer?

I'm thinking of getting a mac mini to act as a htpc using plex.

One of the needs I have is being able to stream the screen from a computer to that mac mini... but without needing to do much in the mac mini.

I could open screen sharing in the mac mini... and control my computer from there... but it doesn't sound like the best solution. A reverse screen sharing solution would be great though...

Is there any other way of sharing the screen from a mac computer to another?