I didn't say it's impossible but it's more complex then a normal port for an ARM device. The issue is it requires more knowledge on the issue and will eat far more time. A CM port to x86 is a very unlikely goal for a single dev , and I'm saying this because a few months ago I discussed this issue with the people behind Android x86.
So a talented DEV will be able to achieve this but it will take time and a bigger struggle , that's why to start of developing for this device it would be more reasonable to look at Android code already ported to x86.
Devices : Galaxy Tab 7 Plus ; Samsung Galaxy Note 2 ; FeiTeng H7100