Not a single sentence in your post is factually accurate.
The world has not already made a path to USB 3. Motherboard support is still abysmal, hardware support is somewhat lackluster. USB's raison d'etre was for low-speed devices, to replace serial and parallel and game ports. Firewire was supposed to be the high-bandwidth alternative. But with USB 2.0, it was "fast enough" for most needs, and so FW took a back seat. Nonetheless, USB actually tread into the high-bandwidth territory, so if you want to blame something, blame USB for stepping out of line.
Leave it to Apple, huh? You do realize that Thunderbolt is not an Apple innovation, right? (Hint -- Google Intel + Thunderbolt.)
Not a bad little computer except for being overpriced and having to run OS X. Wrong and wrong. $600 is fairly reasonable. Go ahead. Design your own mini PC, with quality parts, for less. I'm considering this for a mobile recording rig because I don't think I could make my own any cheaper. Especially rack-mounted. With the possibility of having external PCI slots, the advantages of a "real" computer are dwindling. If you go with cheap parts and build a traditional tower, you can get by with a little less cash. But don't forget to include the OS license too.
Oh, and on the OS... you can install Linux or Windows on there if you wanted to.
The leaves the first sentence about this being absurd. If you were speaking about your following rant, I guess that sentence was correct after all.