It would be really interesting if Apple just completely ignored the 6.1 and 7.1 and ended up going all the way back to the 5.1 and made a desktop computer that was accessible to everyone.
The 7.1
is the 5.1. They even went some distance to make it obvious in terms of looks.
"You want a cheese grater? Here you go!"
I think that, much more than any closed door board room meeting where' people are whispering "I'm sorry", the 7.1 is a beautiful "Sorry, you were right".
And don't for a second confuse people who got into the 5.1 late via eBay with those who bought it from Apple at launch. To me, at the time, the 5.1 was... if not eye-wateringly expensive, at least pretty costly. I had to settle for a single CPU 3.33 GHz 6-core with an ATI 5770 for my personal use computer.
One difference I do think it's worth pointing out is that while my 5.1 config was considered a good 'price performance' tier, the entry level 7.1 was always considered weak, and stepping up got more expensive, quicker.
But at no point at launch was the 5.1 a cheap case that enthusiasts threw themselves at to 'spec out'.
The 7.1 is fine as it is, but the transition is being forced.* At least another generation would lead to more updated components such as MPX modules, which would be great on the used market. I didn't buy my 7.1 new, but I didn't have to wait long until I found a good deal. That's how the enthusiast market needs to look at that computer. Also, I find it kind of nice—borderline surprising—that Apple actually
did release updated MPX modules. They are quite a unique design and not just a few screw holes that need to be moved.
I'd be pretty happy staying with the 7.1, combing the internet for high end parts, if it wasn't for the Xeon's weak single core performance (real or imagined). I might still do exactly that. I want to see the 8.1 specs and then I'll do some tradeoff calculations and see where I land. But to be honest, I think an AS Mac Pro is the better overall computer even if it gives up quite a bit of max GPU grunt (but I'm not running dual Duos anytime soon).
*= It's easy to see why: Tim Cook has said he is not interested in "piecing together other people's stuff" and calling it a product (CPUs from Intel and GPUs from AMD). There is almost no way around that if you want to present a traditional Workstation. The buyers expect to be able to do exactly that themselves.