OS X Killing Intel Atom Support– No Hackint0sh for You!
This is the stated reason. I think this is being done to send a message to the Atom manufacturing that they won’t be going in that direction in the future. Who knows it may be a hidden agreement with the current chip vendor to guarantee future sales. Click here to read more. Apple rarely does things just for the short term. Plus there are many clever people who will overcome any software limitation Apple tries to enforce. Witness the jail breaking of iPhones. As long as there is a demand, there will be a market.