I hope they don't. I'm all for Apple releasing a cheaper Mac, but one reason why Macs are better in many ways is the tight control Apple has over the hardware and the software and its integration.
If others start building clones, we're going to get just as many incompatibility problems etc as is the case with so many Wintel machines out there.
A Mac is a Mac, and to me that is the combination of hard and software made by Apple, not one OR the other, it's BOTH combined.
So to all other computer builders, stop cloning, and innovate instead, and to Apple, please give us a lower cost mid size tower, and update the Mini!