Our competitors like Zerion and Zapper allow their users to create "bundles" of addresses you want to track (and interact with). It makes it easy to have an overview of your complete portfolio even if it's spread across multiple wallets.
Ideally this would also enable the ability to track certain addresses of interest without having to log in/connect a wallet (e.g. track the DAO wallet(s) cross-chain). This last one might depend on: https://shapeshift.canny.io/feature-requests/p/only-require-wallet-connectingunlocking-when-signing-txs-cache-wallet-addresses