On the 747s, non-elites (and even some elites who don't mind less legroom) often prefer the last three rows when traveling with a companion since there are no middle seats for the outer groups. Since that is also the case here for the last two rows, I wonder if those will become the new "coveted" economy seats for couples.

With 17" width in economy... Let's just say I'll definitely be making an effort to ensure I'm in Polaris.