If they ever pull that off, we can finally dispense with the obsolete notion that these are states (where the fedgov is the servant of the states) -- let's just acknowledge reality by calling them provinces (where the states are the servants of the fedgov).
That will last until the first time that a Republican wins the national popular vote. Then we will be able to watch them squirm to find reasons that they can't do that.
The National Popular Vote bill concerns how votes are tallied, not how much power state governments possess relative to the national government. The powers of state governments are neither increased nor decreased based on whether presidential electors are selected along the state boundary lines, along district lines (as has been the case in Maine and Nebraska), or national lines.