Convince me to buy into 4/3

The new 16mp sensor of mft especially the one in the E-M5 delivers great results. Sometimes greater then you would expect from mft format at all. The difference to the other crop systems is overall (!) pretty small. And I say this as a long time full frame user.

Buying into mft is rather about size, lenses, in case of Olympus built in stabilization, quick fokus, in case of Panasonic video and many other factors.

If you want maximum image quality buy a full frame and be done with it.