Sorry, but this really gets me. "Change is slow?"
Please enlighten us to all of the wonders of cutting edge technology that Apple has the corner on that the PC side doesn't (OS X aside).
Does Apple get the Intel procs & chipsets before the PC side?
Did Apple have the first computer with an SSD HD?
Did Apple even make the first PMP?
We should be so impressed because Apple has one product that dominates its market? *sigh*
First off, I am not an Apple fanboy. I'm a Linux nerd. You need to chill.
OK, no technology itself is not slow to change. Consumer's minds are slow to change. That includes Apple people, PC people, and Linux people.
Take for example the MacBook Air. Everyone is in a tizzy because, heaven forbid, it doesn't have an optical drive. Apple was going for the portable factor over everything else. For people who travel, how often do people install software on the road? That's about all I ever use an optical drive for.
(And burning, but I don't take my spindle of blanks on the road to use either.)
Now, I don't think "Jobs can do no wrong." I think that's Apple's problem, that they scare people away -- the superdrive should not have been a hundred dollar add on, but rather included. Just like the way Apple needs a mid tower. It eases transitions and makes it easier to justify switching.
Take my roommate's girlfriend for example. She's a PC user. She says she just wants something that just works, no fuss. Even to her, the obvious choice is OS X. However, she already has a monitor, keyboard, mouse, etc, and cant justify spending the extra money to buy those items again (in an AOI.) Most apple fanboys would say she needs a mini. However, simply based on the mini's size, she wont buy it, because she has nowhere to put it. (She's got one of those computer desks, where the tower goes by her feet.) She doesn't want to put the mini down there, as she's afraid she'll break it. A consumer tower would be perfect.
Apple people are just as bad. Many think that if it isn't an all in one, it's garbage. That is not true. My Linux boxes that sit under the desk have far less clutter around them than my laptop (PowerBook G4, the battery's fried, so it's essentially like any AOI.) And since I can put the HDD's inside my Linux boxes, there's no clutter that way. If Apple would put those same trays that they use in the Mac Pro in a consumer tower, even people like my roommate's girlfriend would use internal drives --they're cheaper than externals too.
For the so stated "prosumer," a consumer tower makes great sense. It should allow the use of two matte screens, for any photo hobbyests that would rather spend their money on the camera than the Mac Pro to process the images. Additionally, many people use the mini as a media server. It's not really quite cut out to do that, mostly based off of HDD space, and expandability. The consumer tower would be great for people looking for a home server. (Again, those who do not want to go broke for an Xserve or a Mac Pro) And because it will be just as fast as any computer accessing it (for a while) it won't slow people down any more than the network.
Change is slow did not imply that Apple always does things first. It's saying that people want what they want. Apple can't dictate what consumer's want by only selling what they think consumers should want.
Now, Apple did get that chip for the MacBook Air first.