This makes no sense, by that logic people wouldn't have minded buying a car with worse milage/performace/comfortability for the same money either. It doesn't work that way. You don't have to see them side by side, you just need to know that one is better than the other. It doesn't matter whether you learned that through personal observation, or through media, internet, word of mouth etc. Consumer goods like gaming consoles are highly substitutable products, if you know one of them offers a better value proposition, you buy it. The whole "So what if the other version is 1080p, 720p will still look good" argument holds no water when you factor in rational consumer behavior. You will hear that irrational sentence only from people who are already invested in the system, because that's what consumers do, become irrationally attached once they became wrongly invested.
By your logic, why are people still not buying 360s and 720p HDTVs? Are they not good enough? The only people who argued 720p was 'good enough' were people who bought 720p HDTVs early in the adoption cycle, i.e. idiots like myself. Then everyone flocked to 1080p (rationally) once they were widely available.
We are at the beginning of a generation. The inferior and superior product are launching together. Consumer sentiment is growing, and people are getting informed. When, not if, people know the inferior product, they will steer away.