Gaming PC connected to laptop?

I do most of my gaming in my bed on an Alienware 15. This is because with kids running around and time to only game at night, I don't have the means to sit at a desk with a separate keyboard, monitor, speakers and mouse.

Aside from the Alienware Graphics Amplifier, if I wanted to build a mini-ITX gaming rig - water-cooled and all - is there either a monitor/keyboard/laptop-ish combo out there somewhere or a way to connect a rig to a laptop without losing any of the desktops full hardware power (i.e. CPU, RAM, GPU,etc.)?

Thanks!

something like this?
https://upload.wikimedia.org/wikipedia/commons/2/2a/Rackmount-KVM.jpg

It's a rackmount KVM

In my opinion it can't be done. Only thing which comes to my mind is remote access via LAN to your PC, but I believe that there be some lag, which may affect on gameplay. But I heard about using remote access to make some FEA computations by connecting to strong workstation located somewhere else, but I don't know exactly how it worked.