I guess it's just the one of the steps on the road to force developers sign their apps, kexts, etc.
Why Apple shall fight with Hackintosh users? Hackintosh users are all potential customers. For sure! Hackintosh users are one of the biggest fans of Apple OS. I'm sure that Apple developers are using hackintosh based comps to test various hardware options. Apple does not loose anything. The only thing apple has done, they have shut down selling of pre-installed hackintosh comps.
If you have hackintosh, you will buy soon or later iPhone or iPad as it makes your life a lot easier by using iCloud service. Many hackintosh users have bought later MacBook. Btw, in EU the only way to get Mac Pro type comp is to build hackintosh at the moment (Mac Pro design doesn't conform to a new EU safety standard).