Does anyone know how much profit Apple makes on the Mac Pro?
What percentage of revenue of the CPU's are Mac Pro's?
All the arguments here are plausible:
Pro users need MAX horsepower
Why does anybody need more power than a maxxed out iMac?
X-Plane 10 needs more grfx power than a GeForce 680 MX
Time and effort spent on Mac Pro R&D is better spent on iDevices R&D
Apple can't eliminate their only Workstation
Apple is already abandoning Pro-users, see the software lineup
etc, etc.
Bottom line (duh): Apple is trying to decide what gives more profit:
1. High margin, but very small customer base?
2. Lower margin but for the "masses"?
3. What are the consequences of the choice?
I seriously don't know. But allowing the current situation that in the EU countries you simply cannot buy the Mac Pro says a lot.
I hope Apple has a surprising "Pro" update for us in the pipeline. But it has to show itself quick. Damn quick!!
All these points are valid, but I think there's one more side of that matter that is still missing: Apple cares about their profile, they've proved that in the past. It's not a given that they always make a decision strictly based on raw profit. By abandoning pro market for good, they are going to lose much of their traditionally high prestige and I don't think they are willing to. Musicians, designers, photographers etc were a target group that Apple always took under consideration.
All that said, for this moment (future might prove me wrong of course) I'd bet that they are still going to present a new Mac Pro within 2013 and make a come back.