HDbaseT version 2.0 supports 4K, carries up to 100 watts of power, AND carries USB! If your computer used this to connect to a monitor, it could power your monitor and allow USB connections on the base of your monitor for your keyboard/mouse. Your computer could be 100 feet away if you wanted. It also carries IR, RS232 and Toslink in both directions for CE/commercial control/AVR applications.
Version 2.0 also allows it to run over a normal network. Well, if you have a 10GBaseT network at home, which isn't exactly common these days but in another couple years I'm sure that will become affordable.
Imagine having a phone that supported this. You could plug your phone into a monitor that's plugged into the wall, and it would charge your phone. Or plug your phone into a switch that is also connected to your monitor, and both are powered by the switch. The phone would connect to the USB keyboard and mouse you have plugged into the monitor and if you ran a desktop GUI on your phone you'd have a full fledged computer with proper keyboard and mouse running on your phone. More and more people will bin their PC if that happens, and Microsoft starts to feel some major pain.
What's that you say, a phone is way too small for an RJ45 connector? No problem, the phone would just need some sort of mini 8 pin connector with configurable pins. Sounds like that Lightning connector on the iPhone 5 everyone was whining about....hmmm, makes you think, doesn't it? Not saying this has anything to do with the move to Lightning by Apple, but even if that was not part of the plan doesn't mean there might not be someone working on this in Cupertino right now.
Personally I think Apple will abandon Thunderbolt for HDbaseT down the road. HDbaseT just makes too much sense. Instead of having all these different ports on the back of your PC, you could do with just one, you don't even need USB ports, they move to your monitor. Apple loves eliminating ports, they'd certainly love to someday have a Macbook with only one port.