Such monitors are pretty common now, at the higher end of the market, but most of them cannot charge larger laptops like 15-inchers that need more than 80 watts.
This is my primary concern with the whole "charge your laptop through peripherals" trend promoting usb-c. My laptop ships with a ~200W PSU, so anything that wants to reasonably charge my it needs that amount in excess power. I just don't see it being economical to stuff that king of power into everything. Not to mention I can't even find a 200W usb-c wall charger...