With a battery backup, individuals who enjoy outdoor activities such as campers, boaters and motor home enthusiasts can continue their sleep apnea treatments using a battery in lieu of plugging the machine into standard AC current.
If you have a PC with a DV-I port (it's an off-white port with a lot of tiny holes) and the HDTV includes one, then plugging your PC into the TV will give you the option to do some computing from your couch!
Plugging your Xbox in directly with an Ethernet cable gives you a more consistent speed, but your constrained by that same Ethernet cable if you need to place your Xbox in another room.
Plugging Sonic 2 also had the same effect, complete with additional hidden areas that only Knuckles could reach; these usual contained ring bonuses or special items such as shields.
By plugging into web cams remotely, these armchair investigators are able to log any paranormal activity that takes place and potentially capture a real ghost on camera.