This surpised me. It's something unique. The nearest thing is the Sony. But his is more flexible. On DPReview It contains a sensor, battery and Wifi. Attach it to any m43 lens and use your smartphone as a viewfinder. If you look at the bulk of this compared to a m43 camera, it shows, without EVF of screen, you dont need a big fat camera. I expect other manufacturers might follow suit with a version for Full Frame lenses. Then people will realise how oversized, DSLRs really are.