If you like things quiet and have a soft touch, go for the soft touch variety. Like some pointing devices, keyboards also come in the wireless variety. Don't buy an infra-red wireless keyboard . If anything gets in the way you'll lose keystrokes. Radio-controlled keyboards are much better at avoiding obstacles, but they're more expensive.
Most TV remotes use infra-red.
You can't change the channel. Imagine how annoying that would be if you were doing some serious typing. All rights reserved.