The HMDI consortium finally approved the 1.3 spec, which adds a lot of new features. The most notable is the presence of a mini-HDMI connector, which won't consume much space on the backplate of graphics cards.
Besides the mini-connector, changes include raising the interface bandwidth from 618MB/s to 1.27 GB/s. This was done by raising the single-link speed from 165MHz all the way to 340MHz. This also allowed support for the famous "billions of colours" - or to avoid marketing babble, we're talking about support for 30-bit, 36-bit and 48-bit RGB or YcbCr colour depths. As you probably know, previous spec allowed 24-bit colour depth.