Yes, all NEO holders will receive ONT tokens as a gesture of appreciation to the community. It will be done at block height 1974823, which is estimated to be on March 1, 2018, around 21:00 (UTC+8).
NEO Council announced this airdrop will consist of 20 million ONT. For each NEO an individual will receive 0.2 ONT (50% is freely tradable and the other 50% is automatically locked until the release of Ontology MainNet in Q2 2018).

For those who don’t know, Ontology network (ONT) is a public blockchain infrastructure platform which allows developers to take advantage of a decentralized trust ecosystem and create dApps. The platform is backed by Onchain, a Chinese blockchain technology company.