Here's what Cook says:
The current generation iMac is the best desktop we have ever made and its beautiful Retina 5K display is the best desktop display in the world.
Some folks in the media have raised the question about whether we’re committed to desktops. If there’s any doubt about that with our teams, let me be very clear: we have great desktops in our roadmap. Nobody should worry about that.
Reading a bit between the lines... he said desktops are important and then fails to mention the Mini or Pro. Don't think that bodes super well for those product lines — at least, they're definitely not Top Priority. Hoping I'm reading too much into this; real professional workstations in the product lineup seems like a pretty important strategic spot for them if they're trying to appeal to the "media and development professionals" market.