The most-asked question from readers was whether I expect The Tablet to be a tightly-controlled software platform like the iPhone. No one doubts that there will be an App Store for any possible Apple tablet computer — either a new branch of apps specifically designed for the tablet (as I expect), or iPhone OS apps modified to run on larger displays, or both. The question from readers is whether I expect the App Store will be, as on the iPhone, the only way to write native third-party software for the device.
To me this is so obvious, I didn’t consider it worth addressing. I say: yes, of course the App Store will be the only avenue for native third-party tablet apps. (“Native” as opposed to web apps, which by definition are wide open.) Whatever the problems and complaints developers have about the iPhone App Store, Apple clearly sees it as a huge win. They love the experience it provides, they love the control, and I’m sure they enjoy the 30 percent cut of the revenue.
I truly don't know what to expect from the apparently soon to be announced Apple tablet thing-y, but I'd bet Gruber is right on this point.
There has been essentially no progress on making operating systems more robust or secure, so we get this instead.