A breakup is highly unlikely IMO. Not only has the U.S. govt not been keen to break up monopolies in the last ~30 years, but it actually let AT&T reconstitute itself by re-acquiring most (all?) of the former baby Bells ~20 years after breaking them up.

In addition, the current administration has taken an absolutely anti-regulation approach if you get/stay in their good graces. I suspect that something closer to a toothless consent decree with certain <cough> accommodations to the administration would make this all go away. Not saying it's right, just that it seems the most likely.

I think this would be good for everyone. But Bell corp was broken up not only for the monopoly but also because the government essentially created and subsequently funded the monopoly. At the time it was needed (arguably so) to create a reliable nationwide communication network, Im not sure how much the government had a hand in Google.