But is it the most convenient way to house the hardware? The damned thing weighs nearly 20 lbs! Before buying, it'd be prudent to spec up a solution based around flight cases or Pelican boxes - being more rugged and modular, cheaper, and with greater thermal headroom. I mean, you're not going to be using this thing that far away from a power outlet for very long anyways!
There is also the issue of ECC RAM and Quadro (instead of GeForce) graphics. Most of the time you won't notice the difference, but some regulations mandate ECC RAM for critical calculations (just in case), and some software prefers (and has been tested on) professional GPU drivers.
Engineering (simulation, visualisation etc) applications will often harness GPU hardware to perform calculations, and not just throw pixels at a screen - so in some circumstances you might benefit from a bank of GPUs in a flight-case (a mini 'render farm'). This is of course if you need a lot of computation whilst away from a fast, reliable internet connection (oil rigs are the oft-given example) and are thus unable to use scalable cloud computing resources.
You could also just have a flight case rammed full of compute power and then just X-windows (or equivalent) in with a normal laptop (er, Mobile Workstation) - and save yourself some noise and heat in the process.
Of course, if you are moving desk several times a day and don't want a collection of boxes, then you can get close with a Dell Precision for $6,000 - but you'll have to slum it with a single GPU, only two internal drives and tiny 17" screen.