I like the analogy, and wonder if and when UoP or another for-profit online school will try to move upmarket. UoP et al still see themselves as competing with continuing ed programs, that is, with educational programs for working adults.
UoP is trying to expand by competing with community colleges and continued ed, and my (probably incorrect opinion) is that they will find out that this will be a mistake. The thing that UoP has going for it is massive economies of scale by having one national market, but when you compete against state university continuing ed and community colleges, you are competing against hundreds of local markets, and my prediction (which the UoP administration obviously disagrees with) is that they are going to get burned doing this.
The basic problem with UoP trying to move upmarket is the internal culture. You can teach Algebra I with an army of "adjunct burger flippers", but you can't teach string theory like that. UoP clearly has the financial resources to start a medical school, or a law school, or a engineering school. (Olin College was started with a $500 million endowment and has an operating budget of $30 million). The question is culture, but if UoP doesn't do it, someone else will.
It is certainly possible some people are investigating moving upmarket at UoP, but I expect their voices are not being heard. But the same was probably true for the person at Toyota who suggested coming out with Lexus.
I stopped teaching after my third or fourth course at UoP. By that time, I had turned myself from being a bad online teacher to a minimally competent one. The trouble was that I wanted to do more there, but didn't know how, and UoP was and is tremendously isolating for faculty. I'm sure that among the thousands of faculty at UoP, there were probably a dozen or so people that wanted to do the same things that I wanted to do, and if we got together we could pressure the administration to do some different things. However, I'm not sure that the University of Phoenix administration would appreciate that. So I just gave up there.
From an internal marketing point of view, it would relatively easy for UoP to move upmarket. You have an MBA, now here are some seminars and courses that will teach you to move up the corporate ladder to CEO.
The trouble is the basic culture, and the desire for the administration to keep control. Those barriers aren't quite as high at MIT.
I have institutional affliations with UoP, MIT, and the University of Texas at Austin. Of the three, MIT is the one that is the most likely to care about anything that I say or do. It has a tradition of openness and an fundamental dislike for social authority which I think will be useful.