For a brief introduction to Web 3.0 see Christina Comben’s article on Coin Central.
A more detailed guide is available at Hacker Noon and includes this table comparing Web 1.0, 2.0 and 3.0.
Access to DApps is now available with the growing number of desktop and mobile Web 3.0 wallets
The wallets are able to execute transactions on the internet including setting token addresses for blockchain domains or making online crypto payments.
Unlike a fiat wallet that may contain coins, a Web 3.0 wallet doesn’t actually hold coins (Bitcoin, Litecoin, ERC20 and ERC721 tokens). It merely gives you control over tokens located on a blockchain and allows you to pass control to other wallets e.g. transfer a blockchain domain.