Tesla is already half solving this problem indirectly through their batter research, buuut the biggest issue with electric aircraft is the energy density of batteries isn't, and isn't projected, to get anywhere near what it needs to be to handle long range flying.

Many industry experts believe we're going to see an electrification but in tiers. Pure electric in the regional space, with more regional options than now on smaller planes, followed by hydrogen or alternative fuels powering the mid-range. Long range may go to hydrogen or alternatives, but the density is still such that jet fuel will rein on the longest flights for the next 10-15 years minimum.