An open convention should be the desire of every conservative. From a conservative perspective, we couldn't possibly do worse than Romney. I doubt anyone could name five Republicans with a more liberal record than Romney and even if someone could, none of them would have any chance of being selected in an open convention.
The only ones threatened by an open convention are members of the GOP-E who are scared to death that an open convention might actually nominate a conservative Republican.
There is nothing to be scared of if we go to a brokered convention. But if we do, most likely the nominee will not be from the 4 remaining.
Should Romney get to 1144, it is also possible one of the other 3 could make some kind of deal and combine their delegates.
In any event, this is turning out to be a political junkie’s dream year.