Olympus has just announced a firmware update (2.0) for the E-M5 : it will add smaller AF target (E-P5 like) and ISO 100 (extended, thus probably with a DR loss, but working for raws too).
Olympus - Downloads
The smaller AF target is welcome : as of now I'm constantly using the magnifier to have it available and it slows things considerably.
I wish they would add focus peaking and the possibility to store custom settings (Mysets) on the PASM wheel too, but this is still a very good news.
I guess this new firmware has something to do with the fact that Olympus is introducing a new kit with the E-M5 and 12-40mm. It also shows that they will continue to sell the E-M5 for quite a while IMO and that we may have to wait a little more to get an E-M5 successor (which i hope will not only have the new processor, but also the better VF4 equivalent)