It depends on the direction Honda and Nissan go, but one of the biggest reasons I bought an Accord over an Altima or Maxima last time (I had a '93 Accord and a '94 Altima before) is due to mpg. While Nissan makes some powerful engines, they also guzzle gas compared to most Honda's. I get nearly 35mpg on average in my '99 Accord. I'm not sure their new generation sentra could even get that, let alone the Altima. Maybe an older one but not the newer one. I doubt Nissan will improve their economy in their new gen Altima's. They've really been hitting on performance, not economy. But if they do, I'll take a look. If not, I don't really care what the inside or out looks like.