iPhone charging? Like this:
http://www.apple.com/shop/product/MK0X2AM/A/usb-c-to-lightning-cable-1-m?afid=p238|srbXGZDuM-dc_mtid_1870765e38482_pcrid_52243316890_&cid=aos-us-kwgo-pla-btb-slid--product-MK0X2AM/A
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Connecting to "Pro" equipment? Well, that depends on the interface the Pro Equipment has, now doesn't it? But I'll tell you what: With 80 Gbps of raw I/O bandwidth (pretty much TWICE as much as any other laptop!), and an internet-full of adapters and cables to get from USB-C to WHATEVER YOU WANT cheaply and easily, it isn't even a problem.
For instance, I can turn EACH of those USB-C connectors into FOUR USB 3.0 connectors, EACH running full-tilt 5 Gbps. And we still have THREE Ports left...
Same with FireWire, Ethernet, HDMI, Audio I/O, External Graphics Cards, etc etc. USB-C/TB 3 can be easily and inexpensively "broken out" to ALL those things, many of them SIMULTANEOUSLY.
For example, here's the truly amazing amount of I/O you can do with ONE USB-C/TB 3 Port on the new MBP:
https://eshop.macsales.com/preorder/owc-thunderbolt-3-dock/
So don't you worry about "lack of ports" or "Pro connectivity" with the new MBP. It's got that part DOWN.