Use a macbook Air for watching TV using thunderbolt I have a dish tv connection. The receiver has a VGA out port and an AV output port.

I want to see the tv on my macbook air. My question is - 
Can I use a thunderbolt to VGA cable to view TV on my computer? 

I assume the direct answer would be no, but may be with the help of some external software?
The answer is still no! The graphic card inside the MacBook cannot handle video input! Only output!

Second: There is currently no working adapter beside "HDMI to Thubderbolt". No converter yet!