Anything to reduce the amount of cables I have behind my Amp and computer is considered a big step forward!
It has great potential, especially with the built in PoE! You could power, TV's, VoIP phones, games consoles etc with no need for all those separate power cables!
The real plus is for PC's that can function on less than 100W. You eliminate the display / power / network cable and just have one for them all. (I didn't mention audio as HDMI can carry that).
It's doesn't quite match up to DisplayPort's 17.28 Gbit/s transfer rate as it only manages 10.2 Gbit/s bit i'm sure as the standard develops it will catch up. Its good enough for 4K.