It's a good thing that the concept of windowed application isn't patented, or that those implementing it in the Android OS have it licensed if it is.
That way we can at least be sure that Microsoft won't sue Samsung for adding Window application mode to the user interface of the Galaxy Note 10.1 tablet.
Indeed, Samsung has pushed the Android 4.1.2 update for the Note 10.1, which enables multi-window application launching
A single tablet screen can run up to 16 apps at a time, assuming said apps support the feature.
Performance will, of course, take a hit the higher the number gets.
Full-screen view, "dual view," and "cascade view" are all supported by the Jelly Bean software now.
The stylus sold with the tablet will make navigation between the many apps easy.