Quite honestly... this is the gaming industry, not the technology industry. I know Sony has lost sight of that, but there is a reason why the last generation lasted that long. We DON'T need the latest technology constantly.
As much as Sony wants, i don't think what they are aiming to do will work with the market. It will be too confusing for the average consumer and the hardcore consumer will feel gouged.
So... i think they are trying to hand the market back to Microsoft and Nintendo. You can either buy a system that is outdated and whose games don't run so well after 3 years... or you can buy an xbox or nintendo console whose games are optimised for it for 5 or more years.
Consumers aren't stupid. I am pretty sure that Japan and europe won't accept this. US is easier to fool, but even so... its MS home turf.
Also, this doesn't make it easy for developers and publishers at all. They will have to develop and bug test multiple versions of their software. Also, if it runs crap in say the regular PS4, word will come out and their game's audience is actually shrunk to only PS4K userbase. This is bad in all fronts.
