Curved TVs are a great example of marketing hype, and how it was all about the hype at the end. From an early adopters point of view it was cool and as the product matured it became stale and opinion swung the other way around. Just go have a look at the tech channels on YouTube, all the praise a few years ago... /cough, paid for influence, but I think many liked it as it was something new.
Today, curved computer monitors are the cherry and the only cherry. Even these had its doubts, but then came Samsung and curved was making monitors great again. Most gamers I know prefer curved monitors. Curve in my opinion doesn't make sense on 24" and smaller, but does become very usable on 27" - 34" and on the various sizes of wide screens.
Curve has its use cases and it does make sense in captive gaming, but that is it for me.
I am also sure curved TVs will return in time...