110 film anyone; APS-C anyone
I'm not all that old (okay my spouse say I AM), but I seem to remember there was a time when the average Joe camera schlub could only afford a 110 film camera and 35mm SLR's were for advanced and professional photographers. Then in the recent years before digital the price of 35mm SLR's came down into the affordable range for most people and 110 seemingly disappeared.
I think APS-C will continue for years to come as the commuter car of the camera world ... appealing to the greatest number of people who want the benefit of being able to change out lenses for a reasonably low introductory price. As long as FF cameras are above $1,500 for the body, I think APS-C will continue to dominate.
Then again, a client of my firm who is a noted photographer and inventor, acknowledged that his new I-phone actually take pretty damn good macro photos and he can send them instantly where ever he wants and even up load them instantly to his web site. :o I can see it now the Sony Alpha phone. ;) Coming to your new and improved (namely darker web page) SonyStyle Store. :p