Press release from BMW USA just now on feature release dates for US:

BMW iDrive Touch Controller – fingertip control coming in 2013
BMW LTE Car Hotspot will be available for US models in 2013.
New-generation BMW Navigation system - This new system will appear in the US this fall in 2013 MY BMW 5 Series, 5 Series Gran Turismo and 7 Series models as well as the new BMW ActiveHybrid 3. Other models will follow.