Mhm... Actually yes, I always thought they were excellent examples of good ports, that's why I mentioned them in this context.

Anyway, forget those two:
My point was that it's getting even more difficult than it is today if you want to do it right. (And I hope developers want to do The Right Thing.)
The menus may be the most evident example: It'll not be enough to transfer them from horizontal to vertical and remove icons, you'll need to re-design the whole UI from scratch if the original application has more than 10 menu items and some sub-menus.

I also find it hard to understand why a the-device-formerly-known-as-an-internet-tablet has a more restricted UI than, say, my two cell phones with smaller screens and less powerful hardware. Doesn't matter, though, does it? I'll buy, I'll learn, I'll love. As before.