Really, have you not read any of the comments on these many pages here? Most of those posting support for this are people that have Macs now and are ready to "jump ship" to save a buck. Mighty short-sighted folks.
You are also missing one important point, the market share increase that Apple is now enjoying is due to PC folks moving to the Macintosh for the first time (like me). Had there been a cheep alternative available to me that worked with little effort or risk don't you think I may have gone that way. I don't think its a great idea to provide non-Mac users the opportunity to settle for a cheap MAC clone since they don't know the differences that those that have been MAC users for a long period know. My point is that this type of device could slow the increase in market share that Apple is now enjoying. An increase in market share is good for all of us since it will lead to lower costs for equipment eventually, more diversity in product lines (since there will be more diversity in demand with more customers) and more R&D money for Apple to innovate with.
Just think this trough carefully before you support this idea.
First of all I don't think people posting on this forum, specifically in this thread are indicative of the general Mac customer population. And I'm not saying no one will do this I'm just saying the people that do switch don't add up to numbers that matter. Especially when you look at the increased popularity for OS X all this will bring. Second of all, there is a difference between a PC with OS X slapped on and a Mac bought with support. You may not think many people realize this, but they will come to learn.
Some users will put up with Hackintoshes, mostly computer people and enthusiasts, normal consumers don't want to be bothered. I doubt this will slow the uptake of Macs in the long run.
Let's look at the products Apple sells:
iPhone/iPod Touch: Obviously people wont buy clones of these.
Advantage Apple.
iMac: Good computer, decent price. All-in-one unit. Nothing really like it as far as PCs go. You'd be a fool to buy an All-in-one hackintosh since one minor change and you're screwed. People who think they need a tower configuration with upgrade options aren't going to buy a Mac anyway.
Advantage Apple.
Mac Mini: It's already cheap. Same upgrade issues as the iMac.
Advantage Apple
Macbook/Macbook Pro: No contest here.
Advantage Apple
Mac Pro: Ok, here is the first sign of a problem. The Mac Pro is expensive. Is it worth it? Maybe. Can you build it cheaper? Yes. Are companies going to avoid the Mac Pro and get the cheaper EFiX option? No. Individuals? Maybe.
Weak Advantage: PC.
XServe: You think people are going to trust their OS X servers on something other than non Apple platforms?
Advantage Apple.
I see a lot of "I'm a gamer, I now I can run OS X too" That's ok to me since gamers don't buy Macs anyway.
Mostly the people excited about EFiX are people who tinker with computers anyway: not the general population OR people who have been waiting for something like EFiX or Psystar to come along, not waiting to buy a real Mac.