The E-Series specifies 'up to' 16 local dimming zones for the E-Series, and some sets have been reported to have as few as 5 'local' dimming zones.
The M-Series specifies 'up-to' 32 local dimming zones, so hopefully the M-Series will have more dimming zones than the same-size E-panel, but we won't know for sure until they come out and in any case, there is no guarantee that your M-Series panel will have a full 32 dimming zones (which is still a very small number of dimming zones for effective FALD in any case).
The M-Series does have a faster 'Clear Action Rate' (frame insertion) than the E-Series (720 for the M Versus 180 for the E), so that should be an advantage, but I have not seen anything to indicate that the native refresh rate of the M-Series panel is 240 Hz - where did you see that?
The M-Series has an 8mm bezel while the E-Series has a bezel that is '33% slimmer than last year's model', so hard to know what that ends up meaning, but I agree, the M-Series bezel should be slimmer or at least as slim as the E-Series.
From the pictures, it spears that the M will have grey bezel and stand (brushed aluminum?) versus the E which looks like it will have black (plastic?), though I could find no reference to the materials used.
And yes, the included QWERTY keyboard is another advantage of the M over the E.
The other significant difference I noted is that the M-Series will have 'Active Pixel Tuning' technology while this is unspecified for the E (may include it or may not).
I'm in no rush and can wait for the M-Series to come out and for the reviews of picture quality of the M versus the E. But for those itching to get a new panel, I feel for you. Aside from the additional goodies like the better styling and the keyboard, it's difficult to say if the picture quality of the M-Series is going to be significantly better than the E-Series... For an additional $300 (for the 65" panels), it's a no-brainer if it delivers improved picture quality. But $300 for a brushed aluminum bezel and a keyboard, and more importantly an additional 2-3 months of waiting for the M-Series to arrive, is pretty borderlinei f the underlying picture quality is essentially identical...
Good summary of the differences; thanks for that.
I don't care at all about the remote, the bezel width, smart apps, etc. I essentially just want a huge monitor with good image quality.
If they made an 80" E series, I'd probably jump on it (pending reviews), but I'll probably end up waiting for the 2014 80" M series. I need to replace a projector with 92" screen that got ruined by a burst pipe, so I really don't want to go any smaller than 80" (and I plan to move the seats a little closer to compensate). The wait is going to be tough, though.