The creator of Heroes suggested to Metro that people may start to prefer shows that require less of a commitment of time.
Kring said: "There are so many different things to watch that to invest in a show that asks a million questions and doesn't deliver many answers for an extended period of time is a lot to ask for.
"A zombie series called The Walking Dead just launched here, which was a huge success because it was good quality - but also because it was only six episodes long.
"People knew it wasn't a huge time commitment. It gave it more of a sense of an event rather than a series that would go on for years and years."
Of changing expectations of genre shows, he added: "The TV screen on your wall has a $200 million movie on one channel and a $2 million episode of a show on the next - so the pressure is on the $2 million episode to excel at what it does.
"With Heroes we put a tremendous amount in one episode and raised the bar for what came afterwards. It becomes hard to blow people away week after week.
"We hinged on, 'I didn't see that coming', moments but after a while audiences see those things happening. We had a rocky road with the writers' strike. Coming back after ten months off the air on a serialised show is hard."
> Q&A: Tim Kring talks 'Heroes' axe