You can get ultra-long HDMI and USB extenders that use fiber optic cables. Monoprice.com in particular sells these under their "slimrun" line -- that's what I

You can get ultra-long HDMI and USB extenders that use fiber optic cables. Monoprice.com in particular sells these under their "slimrun" line -- that's what I used in the house. They are often technically not spec-compliant but work just fine in practice.