Some do, but it’s far from an up-and-running “system” - not nearly enough to enable us to move away from current ATC methods.
Let’s also remember that “commercial” aircraft covers a wide variety of operations. Airlines, on-demand operators, freight, medical evac etc, and they all share the same sky. Then we have the entire VFR world that is sharing some, but not all, of the same airspace. Not all aircraft can be equipped with the latest and greatest stuff, so we have to retain the ability to provide ATC service to everybody, at least for a time. It’s still legal to fly without a transponder or even a radio in some airspace and operations. We still have old technology in the form of VORs and NDBs. My point being that new technology, while great and even vital going forward, hasn’t changed the playing field completely.
I’ll tell you what I look forward to, and I’m just speculating here… When I do over-water flights I’m always amazed at the low tech communications and separation. We talk on high-frequency radio and make position reports. This means that in 2019 we are still in a situation where a guy in a room is essentially pushing around models of airplanes on a map based on where we say we are and where we predict we’ll be next at a certain time. It works well (and there is tech in the form of SELCAL and CPDLC to augment it if you’re so equipped), but it’s really 1940s-ish. I’m hoping next-gen satellite communications and positioning will eventually obviate the need for that stuff.