"but it feels like Jobs is playing games with Raskin's observation on familiarity "
Raskin actually said that was his/their biggest goof with the Macintosh. He is quoted has saying "windows was right" on the subject of two-button mice.
I agree with AltRN8 on kids and two-button mice, but I have used two-button mice on Macs since I got back into computer in 1998. I was shocked to find out that Windows did the same thing.

(Hey, when commodore bit it, I started spending all my time with music).
I do wish it was an option with macs. I was just shocked to see it. I thought it wasn't to be for a little while yet. I looks pretty cool... Darker. :-o
"I expect the two button mouse from apple to be "unique" in some way. Probably ambidexterous with some other "never been done" feature. So mostly style over subtance with something weird that will make people go hmmm. That's their market now though, I would expect nothing less."
I think it's two-button, scroll/click, straight up. (but it might be wireless) It's the same shape as the one-button job, but Darker instead of the bright (white) one-button mice.
A mouse with one-button was great for System 6, but we live in a different world now. A world without Amiga. :-(