Now I'm looking forward to the day when EVFs and on chip AF are good enough that they can finally replace OVFs. If I had "live view" on my 7D I don't think I would ever shoot in anything but manual mode.
The EVFs on the latest M43 cameras - Panasonic G6 & GX7, Olympus OM-D E-M1 (& latest separate EVF) - have such high resolution that they evidently look almost as good as OVFs and in some ways are better than those of most DSLRs, including coverage and magnification. See here, for instance (scroll down a bit):http://www.dpreview.com/previews/olympus-om-d-e-m1/3
As it is, the EVF on my OM-D E-M5 impresses me. No, what you see through its viewfinder isn't as attractive as what you see through an OVF, and so long as you have the shutter half-pressed you won't notice if the scene changes, but if nothing else the ability to change exposure by merely turning a dial while you look through the viewfinder and see the effect of each change as you turn the dial makes getting the exposure right a much quicker process.
As for all the workarounds needed to make the EOS-M anything but a trial to use: I agree that the images it makes can be excellent, probably better than any current Canon APS-C bar the 70D (aside from high ISO performance I'm especially impressed by how its auto white balance copes with awkward combinations of indoor lighting), but for me they're not worth the annoyance and inconvenience. (And in addition to everything mentioned in this thread, focusing on specific, small things is tedious and unreliable.) It's rather incongruous, given that for my taste Canon's DSLRs have the best ergonomics by far of any I've used. For now I'll stick with them and my M43 cameras and add my EOS-M to those on ebay.