Professor Adam Winkler thinks it makes a lot of sense. He certainly would present an interesting character for the GOP - an African-American Tea Party icon. But I think that, notwithstanding the exciting possibilities that could come out of a brokered convention, the candidate that emerges would likely be a remarkable risk for the Republican party. An overwhelming majority of apparently legitimate candidates can't ultimately "hit major league pitching" (to quote Newt Gingrich.) And even those who can often lack the charisma to light up a campaign. (And then, of course, there are people with anger management issues.)
We know nothing about how Thomas would hold up under the klieg lights but my guess is...not so well. It sounds to me like this is more of a Democrat's fantasy than one likely to advance the GOP agenda. After all, it was first proposed by David Lat and Kash Hill. And I'm pretty sure that, notwithstanding the political diversity among Lat's judicial hotties, David and Kash have a preference in this election. And I don't think it's a taste for righties.