Why develop a medium size tower when the needs of most users would be served by a super-sized MacMini? See Analysis of the Oct 2012 MacMini.
The best thing that could happen to the Mac Pro line would be to see two models offered ( both pure speculation of course).
This speculative offerings actually make a lot of sense: most users would find a Mac Pro Mini quite sufficient and it could be offered right away using existing chipsets, with the big tower Mac Pro Monster coming late in the year.
Mac Pro Mini
A supersized MacMini need only offer enough memory, a really fast CPU and decent connectivity; job done for many users:
- ~3X the height and ~1.5X the footprint of the MacMini
- 6 cores with Intel Core i7 Extreme at 3.3/3.6 GHz
- 4 memory slots for up 64GB memory (with OS X bug fix to allow it).
- 1 PCIe slot for extra graphics, PCIe SSD, etc.
- 4 Thunderbolt ports
- 6 USB3 ports, fast graphics,
- One internal 3.5" drive bay.
- Four internal drive bays for 2.5 " drives (SSD/HDD).
Mac Pro Monster
Basically a true workstation grade machine:
- 16 CPU cores (dual CPU).
- 16 memory slots, for up to 256GB memory (with OS X bug fix to allow it).
- 5/6 PCIe slots.
- 4 Thunderbolt ports.
- 8 USB3 ports.
- Ultra fast graphics.
- Drive bays for four 3.5" SATA 6G drives.
- Drive bays for four 2.5" SATA 6G drives.