Great take by Sebastiaan de With on why Apple needs to cater to the pro community and care about the Mac Pro again:

The same kind of huge leaps are happening in gaming and game development; a powerful modern GPU is a requirement for working on and using VR and AR, one area Apple is said to be working on. Demand and interest in 3D work, for design, game and software development, and video is bigger than ever and growing exponentially.

Without a truly top-tier workstation, Apple will miss out on a huge segment of digital creatives that can craft the future of human-machine interaction — something way beyond tapping a piece of glass. It would lack a Mac workstation with the raw computing power to prototype VR and AR interactions, build game worlds, simulate complex models and render the effects of tomorrow’s great feature films all the while offering those same creatives a platform to create for its own mobile devices.

The Mac Pro user base may be a single-digit percentage of all Macs sold, but it’s a group of users with an important indirect effect on the Apple ecosystem. Very often, they are the same users who make the movies, videogames, TV shows, music, and apps we put on our devices every day. They are few people who create highly influential content millions of others use, enjoy, and rely upon. And Apple has realized they don’t want to let that community go.