Apple's idea is that your monitor will be the hub. See the new LG Ultrafine Display. Just connect your Mac with one cable and you're ready to work.
This has all happened before with the original iMac. And it was universally seen in the long run as one of the best decisions they made.
Monitor-as-dock makes a great deal of sense for the roving user with a fixed base.
I would be happy if an adapter exists for this job. The monitor needn't natively support DisplayPort.