Goofballtech:
- How do you intend to get the signal to the arduino? buttons and DC control voltage, Ethernet, wireless, etc.
Or infrared! You can pick two "unused" buttons on your remote to send the signal. If it's a programmable remote, you could program an unused device (e.g. the "VCR" ;)), program it to some protocol that will not conflict with any of your other things (DVD, TV, Satellite, etc.), and then train your Arduino receiver to watch for those signals to move the TV.
Goofballtech:
2. What piece of hardware do you intend to use that will handle the load of pivoting the television? DC motors, AC motors, (very large) servos, etc.
For a recommendation on that it's important to know how much torque must be provided to swing the TV. Give it a little test: put your finger behind the TV about 1" from its pivot point and pull it; about how many pounds of force does it take to move?