WatchOn is definately the included app meant to be used for remote stuffs, but I found it lacking for my needs. I did like that it integrated with listings so you could find a show and point it at your tv and 'watch now', but I spent all the fun money on this tablet instead of upgrading the living room electronics.
It will likely work if you have a normal/basic tv setup, but I have a bit of an older tv and the tuner inside does not work too well. We use a VCR that gets a better signal off the cable for channels, but no way to make this app do channels on a vcr (or any vcr commands for that matter) and send volume controls to the TV. For reference, a universal remote can do that just fine, and costs under $20. I find it sad that they couldn't implement in software what a cheap universal remote can do...I will be looking to see if some other software is also usable with the IR blaster.