"long term", EVs are going to be significantly lighter than modern gas cars because the batteries will continue to shrink. An electric drivetrain is much lighter than an ICE drivetrain.
I think they'll probably end up around parity. Energy density will improve, but people are still likely to want to have a big enough battery that range isn't an issue.
One thing I think that could dramatically improve people's perceived need for energy storage capacity is if we started getting electrified roads where cars and trucks can charge while moving. (There are some of these in Sweden and Germany as test projects, and apparently Sweden is moving forward on doing a permanent installation.)
One thing I think that could dramatically improve people's perceived need for energy storage capacity is if we started getting electrified roads where cars and trucks can charge while moving. (There are some of these in Sweden and Germany as test projects, and apparently Sweden is moving forward on doing a permanent installation.)