I am concerned that most current anti-trust law was written for standard oil and others dealing with monopolies in fungible commodities.

The problem is we are getting walled gardens of 2-4 companies in many domains (voice assistant, mobile phones, cloud providers, IOT platforms, App Stores, consoles). Each company can be framed as both a double digit participant in the segment and a monopoly on their own platform. In each of these there is competition, however there is often little incentive to take a different path, and instead adopt a duopoly position.

I really think they need much broader definitions of anti-trust, including use of a non-dominate platform to unfairly compete in a different area.