Apple TV 1.0 (F)
Oustanding frequency of crashes and sync issues.
Erasure of content arbitrarily.
Unaffordable and antiquated model for TV Show viewing.
Apple TV 3.0.1 (C)
Improved Bonjour syncing and reduced crashing significantly.
Added rental of Movies.
Macbook Air Rev. A (D)
Significant heat problems.
Underpowered (netbook) and overpriced.
PATA HDD and no graphic capabilities.
Macbook Air Rev. C (A-)
Major CPU, SSD/HDD, and graphic improvements.
Apple iPad Rev. A (C)
Ten things missing especially iSight.
Rip-off for 3G chip, misleading customers with monthly data.
Apple iPad Rev. B (A-)
I'd like to imagine it will be akin to 2G to the 3GS.
Possible enterprise model available 2011.
Apps that fully utilize the product. (recall how long it took for Byline, Tweetie 2 to appear)