RX100 compromise the viability of Micro 4/3s ????

You can not change lenses on a RX100, this is the main reason why I buy a system camera.

Maybe the RX100 kann make the standard kit lens obsolete, but I'm not even sure about that.

EM-5 + 9-18 + 75/1,8 or 60/2,8 macro + RX 100 sounds like an interesting concept to me.

Btw, with the pixel density of the RX100 sensor you could have around 40MP on a 4/3" sensor...