Re: Pocket Rocket
The last Mac Pro was very much tuned at a workflow that wasn't coding - ie, video editing and thus shunting a lot of data very quickly and frequently between onboard and redundant off board storage. That use case is almost the last justification for a workstation, since other workflows such as CAD or animation can just have a GPU farm steered by a modest desktop.
Which is a long way of agreeing with you; it's hard to see what next year's Mac Pro will do for you over a Mac Mini. Tim Cook says it will be modular, but ultimately how much power do you need on your desk before building a render farm out of commodity hardware seems like a good idea?