OM-D E-M5 Photographic Dynamic Range and Read Noise

The graph for maximum theorical DR for 4/3 sensor size worried me..

That means we at m43 ar at our maximum at high iso...

Does it means we won´t have better performance than om-d at High ISO ?

Photon noise could be better at least... but I think that om-d is already at 57 to 58 % at QE. only just 0.5 EV to get better results... although that would make iso 12800 usable and iso 6400 good for day to day as iso 3200 already is on OM-D.