Meh, a stimp meter could run about the same as the current greens. Just be a more precise science and make it a little more interesting. I've played a lot of virtual golf, never seen the stimpy meter applied. Great idea. I imagine WGT would have to get rights to it.
Also like the little pop up idea. I know I've gone into a few ready-gos with slow greens, not noticing the slow greens, thinking they were as usual very fast. After my first putt comes up 6 ft short I remember, but a little reminder would be nice. =)