> Money doesn't buy that kind of real estate, ownership does.

If this is the reason, the remedy doesn't attack the root of the matter. If Chrome were unbundled from Google, what's to stop Google from creating a new Chromium fork - and naming it Cobalt and marketing the hell out of it to achieve the same market share?

Antitrust orders are more complicated than just declaring a business unit spontaneously independent. They usually include provisions to ensure the the situation is actually fixed, like prohibitions on the parent competing in that entire market and financial/infrastructure support for the new companies on their transition to independence.