Well I've got a couple thoughts (though I didn't make it all the way through the blog), in no particular order:
4K is coming, it's "almost" here, but not yet. It's not unreasonable to expect that manufacturers have started pumping their R&D into 4K, and have sort of given up on 1080p machines, leaving nothing new for this year.
Second question is what do we really expect to see at the low end? Nothing has really changed for the last few years technology wise. Same similar imaging devices, same resolutions, same sources, same connections. So what are people expecting from new machines? Often there's a modest increase in specs, but often nothing to really write home about (the HW55 sounds little different than the HW50 for instance. JVC "had" to go add a DI this year to make for some newsworthy improvement to their machines.
CEDIA Expo, the show for the Custom Electronic Design & Installation Association, note the "Custom" and "Installation", the internet is killing installers and B&M's especially at the low end. The high end is still somewhat safe due to distribution agreements and the fact that people at the high end often look for more of the work to be done for them (I'm guessing at least), but at the low end who wants to go to a B&M these days and pay retail (or negotiate) when they can just buy something on Amazon or the like, for prices B&Ms can't even compete with. I was in my local shop a while ago to pick up some parts for my equipment rack, and after a customer walked out they made a comment about them being an "internet shopper" (or something to that effect), someone who came in just to see the machines in person and then go order it online. In this situation, if your CEDIA members can't sell low end machines, why would you bother taking the time/effort/cost to display at a show like CEDIA.