I suppose McCain showed off his presidential chops if what you're looking for is, y'know, bluster rather than an actual plan to handle the crisis. Pushing Georgia into NATO would commit us to, y'know, actual war with Russia. The only ones who can possibly think that's a "Presidential" idea are the gang at PNAC and similar necon cabals.
Most Americans are probably sufficiently pacified by the idea of McCain and his close personal friend, of course. I mean, it sounds good, right?