I would buy one tomorrow if it has EVF, good manual controls, and focus peeking all rapped up nicely in a range finder style body. Sadly Sony will beat them to it.
Sony may have some decent mirrorless offerings, but their lens selection is pathetic.
I will pick m43 any day over Sony.
However, ultimately, DSLRs are still my preferred choice. I used the OM-D for a year and it gave me some great images but I also came to realize I hated EVFs. Also, the grips on these mirrorless cameras are far too small... regardless of how much padding they put on. So, I sold all my m43 stuff and happily ran back into the comforting embrace of my Canon DSLRs.
Who said anything about using Sony Lens. I now have almost a full set of legacy FD/M42 primes and for those closer to full frame is better. The only native lens I use regularly is the 10-18mm.