The truth appears to be that the larger more prosperous markets want less cameras but they want them in the shape of old 1960's SLRs - it's mostly nostalgia for the older generation.
The idea of the Pen Lite and Pens was nostalgia for a simpler compact body and seemingly aimed at upgraders coming up from compact cameras, or later hopefully transitioning from smartphones.
That upgrader and compact camera market vanished overnight as smartphones managed to get a bit smarter and deliver image quality that was good enough for the vast numbers of users.
So we are left with nobody much wanting that upgrader class of camera, and an ever more aging population of older users who like the old SLR look bodies. Now for the younger ones I see the rule seems to be "if it doesn't slide into the rear pocket of my jeans then it is not carried", so large, flat, awkward smartphones rule there.
Thus in my view in the short term any new non-SLR shaped cameras will have poor sales numbers, and even the SLR shaped cameras sales will suffer more in the slightly longer time-frame as the older users fade away. That plus of course that most cameras of any shape, made in the last say 5 or so years are good enough, so why change.
The "E-P7" looks like a last ditch attempt to satisfy the small number of users who like the screen only format and time will tell if they sell enough to make it worthwhile to continue that line. The writing on the wall was with the Pen-F and its "almost met sales expectations" status, so I guess they were very hesitant about further development in that area.
I say "E-P7" as for me it still looks like it really is an E-PL11 that has front/rear dials plus a modified front knob borrowed from the Pen-F. No MySets or Custom Modes so is aimed somewhere lower in the market than some of us expected for an E-Px model.