Acala, Moonbeam, Astar, Parallel Finance, and Clover were the winning parachains in Polkadot's first round of auctions. All of them have been successfully onboarded and are manufacturing blocks after accumulating a tremendous amount of community support through crowd loans, totaling almost 100 million DOT locked.
The launch of parachains on Polkadot brings the initial concept expressed in the Polkadot Whitepaper (aka the Polkadot Paper) in 2016 to fruition. Polkadot's fundamental characteristics were defined in the Polkadot Paper, as well as the network's sharded multichain design. Parachains are the final piece of basic functionality to be completely introduced, as stated in the paper. Polkadot's future development will be decided by its community of DOT holders, who will vote on any future improvements via the network's on-chain governance mechanism.