I don't purposely watch TV or any entertainment on a computer screen. Like you, I love my big flatscreen!
That is why I have the best set top box ever built....... A HTPC Home Theater Personal Computer that is only connected to my flat screen via a HDMI cable. I use Windows Media Center to record and watch over the air television, catch missed shows or surf on Hulu, subscribe to Netflix and watch PPV movies on Amazon and listen to Pandora. Every thing is controlled by one remote and also have a USB wireless mouse / keyboard for the few times I am using a browser. Without the Silicon Dust and a PC I would have several boxes and recorder and still not be able to share the recordings and my music collection around the house to other TVs and digital radios.
Have a microHD for watching backhauls / networks in other time zones and a Roku for a few additional services. The Slingbox and PlayOn are great for sharing programming from these sources to my tablet, smart phone, media players.
We live in exciting times!!! ..... Was outside last weekend using my tablet to control the microHD / dish motor and fine tuning a test LNBF then later viewing signal meter from the TV while fine tuning the terrestrial antenna. A few minutes ago I checked on the home microHD from here at work to see if some test recordings had been completed.