One of the target markets of Macs and especially MBPs is "creatives". Photographers are a part of those. On the MBP 16" presentation page one of the first selling points is that it has a great screen with great colors. The example is a landscape photographer. Of course, you could directly plug the camera in the computer, or have some external card reader, but why bother with carrying more suff?
I agree with the others that thunderbolt 3 is great, and I sure look forward to only having usb-c connectors. On my work computer I love that (it's a pc though). Of course, there's the "right cable" situation, but I suppose that whatever peripheral I buy will have the right kind of cable for it to work. My external monitor does DP alternate mode + PD and the cable that came with works.
That sait, I would miss the magsafe plug, it's probably one of the reasons why my 7 yo mbp is still going strong. I also think they could have left a usb-a port or two, just like they didn't remove FW800 on the first generation unibody mbp.
Anyway, my mbp is still powerful enough for my needs and works perfectly, so I'm not really in the market for a new PC (nor mac). I just like to more or less keep an eye on what happens, just in case.