Interesting theory. If what you say is true, that consumers are going to stick with the PS3 & 360 to play their games, then how would you explain the growing lack of interest for the PS3 & 360? Last year saw a huge drop in software sales and this year will be even worse. It's especially bad for new IPs which at this point in time have little chance to be successful unless it's associated with a well-known brand.
These signs suggest that consumers are definitely losing interest in the PS3 & 360. This loss of interest could be explained by one of two explanations: (1) This is a new and permanent loss as a result of general apathy for home console gaming; or (2) this is just a cyclical loss and interest will regain with next gen consoles. If it's the former, then the PS4 & 720 will be killed, but because of a dying market, not 3rd parties supporting the PS3 & 360. If it's the latter, then the PS4 & 720 will reignite interest in gaming.
I would assume you don't agree with these explanations; both of them contradicts your claim that consumers & developers will flock to the PS3 & 360 over the PS4/720. So what is your explanation for the diminished interest in the PS3 & 360? I personally think the loss of interest in the PS3 & 360 is a testament to the fact that consumers are interested in new consoles, and will embrace the PS4 & 720, especially if there's huge improvements in OS, functionality, motion control, and other features.
EDIT: Pokoko makes a good point about RAM. There has actually been quite a few complaints about limited RAM for current consoles. In fact, many games are faulted as a result of it. I think it's likely that developers will at least use more RAM than what the current generation allows. I'm personally looking forward to games by developers like Rockstar or Bethesda.
