Yes, I would say ipfs is an important component of web3. Ethereum has it's own competitor to ipfs called swarm which provides the static content hosting to pair

Yes, I would say ipfs is an important component of web3. Ethereum has it's own competitor to ipfs called swarm which provides the static content hosting to pair with decentralised database (Ethereum blockchain), and decentralised messaging (whisper), to provide a fully decentralised application platform.