I mean, it depends. On one hand, for 99% of all use cases, there are battery/electrical based systems which will eventually replace ICEs. For example, basically all consumer vehicles, a huge portion of "around town" trucking, and basically all train systems will run off of electricity over the next 20-50 years. However, on the other hand, there may be specific and limited use cases where it actually is helpful to have the energy density of chemical fuels. For example, if I wanted to power "flying motorcycle" type vehicle for long periods of time, chemical fuels would be the way to do that simply because of the energy density. Take a small turbine engine, hook it up to a generator, and run to whatever fancy future propulsion system off that. But thats assuming we dont have an unimaginable change to battery/power generation technology.