Well with that being said I would point out my OG Note got 4.1.2 JB some months back. Biggest thing the OG Note is missing is multi-window. I am not sure if that is ATT or Samsung but seeing how my phone actually performs I would certianly say Samsung has supported it very well, and has pushed it to it's limits. It is time for it go away as it just can't keep up.
I really can't see why air command wouldn't come to the Note 2. Unless there is some hardware related requirement, why wouldn't it.