I kinda agree with you there. They should reserve the "i" for mobile devices: iPhone, iPad, iPod etc.
I think the Mac line up should like this:
Mac
- previously iMac. This is the epitome of Apple design: simplicity, ergonomic, house-friendly, user-friendly, simplified operation, simplified form factor. I think this form factor can even further reduced to iPad level thinness. If you want more graphic power, you should get...
Mac Mini
- Mac Pro no more, the Mac Mini will be powerful enough to match the best of Mac Pro, look at the current MBPr with its Geekbench score of 12,000. That is Mac Pro level kind of performance in a very compact chassis.
MacBook Air (just the tiny 11" version)
MacBook (13" & 15" thin retina design)
- Lose the PRO moniker. Those who know Mac doesn't need to be told they have a pro-level machine in their possession.
2012 Mac Pro Intel Xeon X5675 3070 MHz (12 cores) 22291 that 12,000 score is close..and this is on 2 yo. tech..a 13 Mac Pro should hit 45-70,000 with 16 cores depending on the chosen processor. (Intel Xeon E5-2670 2599 16 Windows 64-bit 35247) that's one processor the MP would use 2.
Where are you going to put the graphics card or 2? How about the 2 optical drives? The 4 HDD's? The 128GB of RAM?