Just tried out this wallet for a bit of fun. Why not,,, add all the different Bitcoin tokens that are also attached to the address, like ERC20 token viewer for Ethereum? This is the only reason I would use a web wallet actually:)
At the moment, this is only a Bitcoin wallet, if you are talking about all the other sidechain assets on Bitcoin blockchain, you can look them up on their own individual blockchains. Did you have a particular token in mind?