Given that we're moving away from QRs to through-axles - partly driven by the torque needs of disc brakes, why not follow the natural progression and move the wheel bearings from the hub to the forks themselves.
Generally you want bearings as close to the load as possible. Having them in the fork is as close as one could hope. It'd also allow the axle to be very thick, which would add strength.
Given that every idea in bicycling has been tried at least once, has this been done before? What are the demerits of such an idea?