@trwnh This was a few years ago, but the experience I had with a cheap 2 in/1 out switch was that it didn't do anything at all about the HDCP "handshake".
If you had the switch on A, and turned on the TV and source A, no problem - you saw A's output.
If you then wanted to use source B, you could turn the switch to B, turn on source B... and the TV would refuse to show you B's output until you power-cycled the TV.
I am told, but don't know, that some of the fancier HDMI switches maintain an HDCP handshake between the switch and the TV, regardless of what switch input is selected. That way, the TV thinks it's always talking to the same device, and doesn't (potentially) get mad when you switch inputs.
Again, this was with an older TV and cheap switch. This problem may no longer exist with newer devices.