the new rage; the latest fad or trend, esp. in a particular field
Flat-panel televisions are the next big thing.
We just felt like it was the perfect thing to be the next big thing, when Twilight was done.
They were the next big thing in computing in 2008 (said The New York Times), then almost forgotten three tears later.
For most of the past two decades, Microsoft has continually missed the next big thing—the Internet, search, smartphones, tablets.