Looks like SRAM has just acquired Quarqhttp://www.cyclingnews.com/news/sram-buys-us-powermeter-company-quarq
I might be speculating a bit (though not as much as the article above does), but maybe improved manufacturing methods and Quarq no longer needing to "buy" cranks from SRAM might lead to turn what is already a competitive price for a crank based power meter into a very competitively priced power meter full stop. Might not be such good news on the track front though, since any viable track options weren't part of the SRAM family of cranks.
Maybe I should pull the trigger on a Rotor 3D model while I still can?
The 'workable' solution for track, if you could be bothered, is obtain a GXP S975 Compact Quarq CinQo; then get a machined chunky bit of Alu which you bolt the 110BCQ CinQo to, and the Ring has drillings support 144BCD. Then if you used a sufficently meaty bit of alu, you put any track ring on you like, and the calibration slope should remain stable. You can verify this with the soon to be released Qalvin iPhone App, and a ANT+ key (or I believe Golden Cheetah and a Garmin ANT+ USB stick will be able to do it).
Buy a bike, park the car, ride your ass off...