Personally I don't think the antitrust will stick. It is incredibly easy to change your search engine. They may be required to select a default engine on install of chrome. I switched to duckduckgo.com about a year ago. With duckduckgo, your results aren't as ad laden, they don't track you, they don't randomly insist you turn on intrusive tracking to provide services. I would much rather take an extra step for the 1/100 searches ddg doesn't cut it than see ads above the scroll. Setting a blue/green color scheme in the upper right corner, instead of the default monochrome makes a big difference.
tl;dr: there are options.