ICE vehicles will still be required in the future for remote location operation, long distance travel and heavy duty equipment, shipping, trains etc. Or hydrogen fuel.
Really? I don't think so.
But maybe you can convince me.
What I know now, is that trains in Europe run on electricity. This is cheaper than Hydrogen and will always be, because making hydrogen requires electricity to break the H from the O2 in water. Then compressed or super chilled storing, transporting and finally reconverting back to electricity, losing about 75% energy in the process iirc.
What I gather is that batteries containing 450wh/kg are required for planes to be viable for longer distance. We just reached that milestone. Short distance is already viable and better still, costs a lot less to operate than current short distance planes. Existing plane operators will adept or will get seriously hammered by electric plane fleets that only fly short and medium distance. Still, in the end, planes are less than 10% of the problem iirc. Ships even less, 1 or 3% iirc.
Focussing on trucks, suvs, cars in general and getting the electric grid close to 100% is more useful imo. Tesla semi proofs electric semi's are very much possible. No need for hydrogen there. The Ford F150 and Cybertruck seem capable of fulfilling the requirements of suv users.
Long distance travel is what Björn Nydahl does all the time in Norway when he tests evs in 1000 km trips. Not sure what is left, but looks like only edge cases to me. If you can get electricity to a place or a windmill/solar panels + battery you can pretty much survive under any circumstance.
Getting the grid to 100% green energy has its challenges, mainly in scaling up battery production but seems achievable.