Can you just imagine being able to see what is available on all services from one interface, all at once, and then start a stream of it seamlessly from whichever you movie profile page you have access to?

When I was little, we used to have a box plugged into the CRT TVs of the time that, when connected to a network, would allow you access to something similar to what you're saying. Typically, you'd be able to open an electronic program guide to see a menu that displayed all the different services that you're subscribed to and be able to switch between streams seamlessly. Granted, the biggest difference is that the individual service providers had a set schedule as to what was streaming at the time, so if you missed content scheduled at a certain time, you'd hope they'd rebroadcast it at some point.

Maybe we could have something similar, but with the ability to pick anything from each individual service providers' library on demand?

Although there was a problem with this system, but I don't really remember what it was. The service providers banded together and started raising prices, I think? But, then again, aren't they doing something similar now?