I have mentioned this before, but today I discovered a videocamera I just got (old model of cheap Sanyo)at work (leftovers) can do exactly what I suggested for the SLR's.
I can use ONE button, aim at a neutral gray area and push ONCE and it has sampled WB, and I can press REC straight away and start to film with the sampled (and correct) WB.
Why isn't this available in an SLR? I am asking because the 1d X has a dedicated WB-button on top now, and the 1d X uses AE sensor to give info to the AF system, and it can track a color.
Here's the question (finally!):
Do you guys think that the 1d X WB-button can actually be used for "One-button" sampling of WB?
And if not not, why the heck not?