Replying to Magnetic ski bindings...?

Alright, well I know there are a few issues that come to mind with this:
1. Release. Obviously if the magnet is strong enough, how tf do you get your ski boot off. I would think that an electro magnet would work for this, but that leads into the second main issue.
2. Weight. I know magnet forces are weak (relative to other forces), so it may require a large magnet, which I assume is heavy. How heavy? I have literally no idea.

Does anyone know anything about this and how feasible this would be??