The tablet isn't about the iPhone at all

It has been proposed several times that the supposed upcoming apple tablet will run iPhone OS at a higher resolution. It's not going to. It's not in apple's style to adopt a one size fits all strategy in anything. However, I have a two theories about what the tablet may be (in order of likeliness):

• A device running iPhone OS X with UIKit interface and frameworks: This may sound like it would run iPhone apps, but it will not. Instead, it adopts frameworks more similar to the iPhone's UIKit than Mac OS X's AppKit. And if it does this, OpenGL ES, not OpenGL, will be the 3D provider of choice.
• A device running full OS X: Full OS X is not a one size fits all strategy in this case... if the tablet's form factor is large enough. The MacBook Air, supposedly the "apple netbook", has a 13" display, and runs OS X perfectly well. The limiting factor on the Air is the full-size keyboard, but if Apple loses the keyboard and goes for handwriting recognition or thumb-typing, the display could likely be a high-DPI ten inch display. If the tablet ends up being as popular as the iPhone, this may serve to push the iPhone halo effect over the edge and get all of those iPhone developers developing for the mac.