By your timeline, Sony probably moved away from Bayer sensors and into some exotic new way of capturing light. Supposedly, the next generation will be coming in April.
You could be right.
Isn't Sony the one that had the recent announcement of a photon counting sensor?
not really - it's a patent application for one.
The important thing is they're working on it (spending money, time & resources).
not really. a patent application is done at nearly the start of the process, you don't do work until you at least get through the submissions and get a patent approved - especially for something like this.
it can take up to 5+ years before that patent is even approved - if ever.
just like the bazillion sensor related patent applications that canon has filed over the past 2-3 years.
CR, CW,etc .. miss most of canon's patents. they've already filed 600 applications so far this year, and by a quick scan, around 40% of them are photographic in nature.