HDMI has a new specification, version 1.4, which will allow for 2 new things: bi-directional audio via an audio return channel and data transfer via the Ethernet spec. So that can mean even fewer cables. Of course, it can mean even more consumer confusion.
On the bright side, having an Ethernet channel built into the cable will mean being able to hook up your AV devices with each other and your home network without extra cables. Devices that support the new spec may be out as early as next year.
The HDMI 1.4 spec can be downloaded from the HDMI Licensing organization‘s (founded by a number of big name electronics manufacturers) website.