If we reported on every screen size, material, product, and mold shape that Apple has tried, it would be like drinking from a fire hose. I'm not saying new screen sizes won't appear in new devices eventually, but let's be realistic.
- iPad "Pro" - Nope*.
- Larger iPhone - likely in the next 2 years. I would expect an announcement related to vector-izing graphics in the OS to be part of this.
- Smart "Watch" - I don't see what Apple has to gain here. I think Gruber's idea of a new iPod with a watch strap is more likely, but even that isn't something I'd bet on. Once battery technology improves, I think this could change. Right now the batteries needed are far too large for a device worthy of the Apple brand.
*The time frame on the "nope" projection is 2-3 years. Not happening.