Airbnb CEO and co-founder Brian Chesky recently told Fortune magazine that its core Homes business will account for less than half of Airbnb's revenue someday. He also said that by 2021 the majority of Airbnb's offerings "will be the new things that we are doing as of 2017 on."
Expendia, Priceline and Trip Advisor are said to be most under threat from Airbnb: