We all want to get better, faster; and the new digital tools continually promise to grant that wish. It is relatively easy to learn how to use the new tool but to really master that tool takes a lot of work...and time. Usually more time than we want to devote. That is one reason that many pros, not all of course but Capa was one, use the same camera for a long time.
So when the next new digital tool comes out and promises more megapixels, and higher usable ISO, we jump on it. This will fix things for us. There are already many of us who believe that the immediacy of the digital age has helped improve us as photographers much faster then would have occurred with film. To some respect that is true, but only with the technique, it still doesn't help improve our vision any quicker.
Now the market is aging, and as some have said, people begin to slow down and step off the marketing merry-go-round as it becomes obvious that they probably are not going to be the next HCB. We have taken some nice shots and spent those hours in front of a computer to pimp and dress the picture just right. But the only place we get recognition is on Flickr, or our favorite forum, so we begin to tire of the work required. Besides, our kids are gone and we really are not that interested in taking pictures of flowers or hummingbirds, and our last digital camera was big, heavy and expensive. Even worse, it didn't improve our pictures much and it took forever to learn how to use it.
So now we see cameras that play to the older buyer's faulty memory of how things used to be. The Olympus Pen was one of the first to exploit this and the trend is just expanding. "Look at this, now you can feel like you are packing your old camera but have even better dynamic range then ever." It does look nice and so we buy it. And as a plus, it is way lighter than that old Nikon F to pander to your lower tolerance for packing too much weight.
Obviously there are many things that sustain a materialistic culture such as is occurring today. It would take a book to cover it all. But, at some point it does have to stop, or at least slow down dramatically. Nothing continues to expand forever.
The improvements keep coming but they become smaller and harder to see; and certainly more expensive. I don't know if anyone really knows for sure but that slow down may have already started.