People usually have trouble getting audio from their PC to their sound system or TV.
I am pretty lucky in that my videocard will inject audio into the hdmi cable just like a console. Pretty slick. I always used to just do it with a standard PC audio to L/R white/red cable I picked up at radioshack for $5. On my PS3 though, i have an optical line run to the stereo as well for when i want that BIG sound.
I know a lot of people that use wireless keyboards/mice at their desktops just because they don't like cables! I think it would open the pc market up immensely if they would push the reality of how easy it is!
Peggle on a huge tv is more awesome than you would think : )