Ever since the LightPeak post, and RUMOR that Apple wants to use it, hit this site everyone wants to talk LightPeak in every thread... it's a long ways off... No, longer than that. USB 3.0 is now getting pushed back to 2011 for Intel chipsets, and that has been in progress for years.
Since going public was a marketing decision not a technical decision, this means it is having chips made to check for production errors.
The delay of USB3 is itself a tick-tock sort of thing. I suspect USB3 and LP will come out together along with the next die shrink. This will drastically improve consumer level high I/O, increase low power delivered processor speed, and do it in a way suitable for handtops and laptops.
mDP was approved as a standard in record time and in such a way the licensing is practical according to a couple of articles I read. The standards body is already looking forward to the double speed version being adopted as a standard "soon". If Apple is a bit forward leaning maybe they could avoid the whole USB1.1 bottleneck they imposed on Mac users and go right to mDP2 as soon as it is practical.
USB3 already exists among bleeding edge adopters, but when Intel does the silicon, everybody at the commodity level will have it. LP will interface with these and others. A limited plug device now, say like the Air has a USB, a display and a power port. Not much. Audio too. An iPhone has audio and dock, which itself is USB+.
If an iTablet2 had mDP, LP, USB, SD, audio, it would be pretty adept at being either local or connected or ingesting content or puking it.
Rocketman