Competition is good. If the smaller form factor is a success, expect Apple to add that to the lineup in the not-too-distant future as well.
I was thinking of my first generation iPhone and how nicely it has evolved. iPhone 4 is the greatest phone I ever owned. iPad 1 is the only tablet I ever owned.
I have a shorter memory. When the 13" MacBook Pro was announced last year, I hit the Boston store two days later. I told the kid, "no applecare, no add ons, just get me the computer." 5 minutes later I'm out the door, MacBook Pro in hand. No "artificial" supply problem here.