They haven't restricted anything, for direct printing to WiFi equipped printers there are only 12 HP printers currently compatible with updates for some OfficeJet printers coming in mid-December.
The code for allowing Airprint to work with Network shared printers was pulled at the last minute apparently due to legal issues with a patent troll.
Go here:
http://elpamsoft.com/Downloads.aspx for an executable file that will enable a patch to print to your printer. The computer must be on and not in sleep mode for you to print.
This download is free.
Message was edited by: deggie