Most likely nothing will happen with respect to these large companies because generally speaking prosecution only happens when the company's status as a monopol

Most likely nothing will happen with respect to these large companies because generally speaking prosecution only happens when the company's status as a monopoly negatively affects the consumer (allegedly). The criteria is usually price of goods/services. It's possible this might include things like privacy violations or data mishandling in the future, but I doubt it. There's a DoJ memo, or something similar, that spurred this recent-ish change in policy but i can't seem to find it.