For direct measurements of power consumption, we would need to custom build a PCIe pass-through that can tap the power. This is hardly a simple undertaking. It may happen eventually if there's enough demand and we find some free time, but don't hold your breath.
Perhaps something like so?
My comment about current VGA cards in general:
1) The graphic card form factor is NOT designed to handle components that generate such incredble amounts of heat. It's basically a silly little "daughter" card with no way to anchor proper heatsink/cooling devices, especially with any real mass. On top of that, the exposed die is on the "wrong" side for the typical ATX tower style case.
2) Two things should be forced on the GPU makers --
-- some way to shame/limit them to.... say, 60W.
-- force them to adopt some form of dynamic clock/voltage adjustement, like CnQ, SpeedStep, etc. and dictate a maximum idle state power -- like 25W.
-- create a new form factor in conjunction with mobo, case and PSU makers that makes better thermal sense of the whole shebag.
3) Anything even approaching 100W is obscene, really, especially when they're encouraging two of them for one box.
I see two trends occuring in the PC industry right now. The first is a trend towards CPUs being measured in terms of power consumption verses performance. Intel's power consumption was/is so gluttonous that it became totally obvious that change had to be made, hence the core/conroe movement. I think in the next several years, CPUs are going to really move towards being much more efficient.
The second trend is towards video cards (plural now) actually bringing 300+ watt PSUs to their knees. So, with that in mind, I think the first trend is going to be less of a factor in "silent" computing than the second, especially since Mike's comments make it pretty clear that PC architecture was never designed to have daughter-boards dissipating 90+ watts.
Not that I'm trying to rag on you--I'm sure there are real engineering hurdles to measuring video card consumption directly (never know--maybe there's a few double-E's in SPCR.com's readership that could pitch in a hand). That being said, video cards are where I see the most egregious power consumption occuring in the next several years.