Yes it probably will improve generation by generation.

I'm thinking Apple (obviously, quite deliberately) didn't include any sort of Camera, so as to not steal potential sales away from their Macbooks - or hell, even their iMacs.

It seems to me, at that relatively low price point, if they added in Webcam/Video recording functionality (something that would extend to Skype and other apps) many people would be tempted to buy - an admittedly higher spec - version of this thing, and NOT the aforementioned Macbooks for instance.