The PS3 and the Xbox are game systems that can play TV. They are not 24/7 appliances like a DVR. A Tivo is on all the time, and everyone I know is familiar with how to use it.
If you're not a gamer, you will not be purchasing a game system to watch online Movies.
The goal of this product is to compete with Netapp. If you've ever experienced Netapp licensing/pricing, this Sun solution is a bargain. People seem to be forgetting that this is a storage appliance.
It isn't easy being the parent of a six-year-old. However, it's a pretty small price to pay for having somebody around the house who understands computers.