iOS Developer not upgrading to nMP
Alright, I'll jump in. I'm an iOS developer and I'm not upgrading to the new Mac Pro.
I use two machines for my work, a 2012 retina MacBook Pro with the lowest spec CPU and 16GB ram, and a 2010 Mac Pro with a mid range CPU, 24GB ram, and a ton of internal storage (more on that later). I should also mention that I have been a Mac tower user for 10 years. I used a Power Mac G5 before I got the Mac Pro.
One thing that I've noticed is that the laptop and desktop are virtually equal in terms of responsiveness. They both "feel" very fast. The Mac Pro has the advantage in processing and RAM. The rMBP has an advantage in storage. Its onboard SSD is far faster than the storage on the Mac Pro. The rMBP routinely hits 400MB/s from its SSD. That isn't even possible on a Mac Pro without going to PCIe based storage, due to the limitation of the Mac Pro's SATA bus. One machine has faster storage, and one has more RAM, and they both feel about the same in normal usage.
The Mac Pro is definitely faster at some things than the rMBP though. Compiling is just a hair quicker, thanks to the 3.2GHz CPU compared to the 2.4GHz CPU. They are both quad core CPUs.
The Mac Pro is also FAR faster at graphics intensive operations, including Aperture performance, and especially gaming. Even with an outdated 5870 that continues to be the case. This is relevant to me because I am also an avid photographer (hence the large amount of internal storage). For things like basic photoshop/pixelmator/acorn use, I can't tell a difference. For Aperture I can, and the Mac Pro is a clear winner.
So why am I not getting a new Mac Pro? Its got incredible graphics, and fast PCIe storage. Shouldn't I be all over it?
The reality though is that I am very happy already with machines that cost far less than the new Mac Pro. My baseline rMBP is 1/3 the price of the Mac Pro I would get. One of the reviews (
Macworld) really said it best. Its not that the new Mac Pro is slow, its that all of the other Macs in Apple's lineup are impressively fast! The older Mac Pro and rMBP serve my needs, so I am going to stick with them.
I am going to do something though. I'm going to add PCIe SSD storage from OWC to my existing Mac Pro. That should eliminate the one spot where its weaker than the recent rMBP and new Mac Pro lineup, by giving it insanely fast flash storage. That upgrade is between $500-$1500 depending on how much of it you purchase, but compared to the price of a new Mac Pro, thats a huge bargain.
More information on that upgrade is available here:
http://macperformanceguide.com/blog/2012/20120415_1-OWC-Mercury-Accelsior.html
Will this be the right choice for everyone? Probably not. If you don't already have a 2010-2012 Mac Pro, I don't think I'd recommend picking up a used one now. In the long run, those machines, and their internal components, will become extinct. Eventually I'll have to move away from that machine, and when I do I'll have to get new drive enclosures and other gear to compensate. But hopefully then it will be cheaper and more prolific than it is now. And at least I know I can take the PCIe SSDs with me, using a thunderbolt enclosure, so that investment will not be for nothing.
Hope that helps. I'm one developer and photographer is passing up the new Mac Pro.