I don't think Microsoft would lose the antitrust case in today's times FWIW.
But back when the case was being determined, the internet was incredibly slow and downloading large files like web browsers was pretty painful (both in time and the avg computer user's know how). So for a consumer to get a competing product to IE (which was free and bundled with Windows) you had to either know how and where to download a competitor or go buy a competing product at a store. These are leaps and bounds over the hurdles of Google competitors today.
But back when the case was being determined, the internet was incredibly slow and downloading large files like web browsers was pretty painful (both in time and the avg computer user's know how). So for a consumer to get a competing product to IE (which was free and bundled with Windows) you had to either know how and where to download a competitor or go buy a competing product at a store. These are leaps and bounds over the hurdles of Google competitors today.