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I'm hopeful it will be good for aviation. It's pretty hard to compete with kerosene's 46.2 MJ/kg. The best batteries today are around 300 Wh/kg in commercial use, and some labs have hit 700+ Wh/kg. But with a MJ being equal to 278 Wh, we're still talking 20-50x the energy density by weight. And that's before even talking about how chemical fuels that are burned off leave less weight behind for the remaining vehicle, whereas a discharged battery weighs pretty much the same as a fully charged battery.
Also, if we do move to storing energy in chemical bonds, pulling carbon out of the air, that basically turns into a carbon sequestration technique with whatever excess solar/wind energy we end up with, especially if we intentionally overbuild the capacity for non-peak production, and leave a method for using that energy during peak periods.
Hydrogen would be a much better form of power for long haul, at least for ships and diesel trains and trucks. By weight it is more energy dense than gasoline but volume is the problem, however for a big ship or a train it makes perfect sense. Point to point intermodal logistics hubs with hydrogen production at either end produced entirely by excess renewable during the day.
Set up one facility in LA and one in Shanghai for ships transiting between them and that could cut thousands of vehicles worth of emissions for every ship. Expand that out to train terminals, truck stops, and certain airports for the right flights - they’re all generally located in the same area anyways.
The problem is the cost of production, but the solution is having so much excess solar generation throughout the day that the cost to produce becomes competitive. Battery tech can always improve, but hydrogen tech is here right now and available today, and only really requires the right incentive structure. Just building out solar panels to lower electricity prices low enough could do that.