I don't want to piss all over your idea here but it has potentially a lot of problems to overcome.
Water and extreme cold: How will you make the electronic bindings waterproof and shelter the electronic components from the extreme cold. Motors don't function very well in the cold, especially tiny ones
Power: How will the bindings be powered? Adding a battery pack is bulky and unsightly, most other power options are expensive
Weight: Motors, Batteries, and wires. It sounds heavy
Damage: Snowboarders abuse their equipment, rocks, trees, rails. It's a sport thats hard on its equipment. How will you manage to make the bindings strong without making them bulky? Also how will a rider tighten the binding if the batteries die or a motor breaks on the binding?
Performance: The binding must be highly responsive in action on top of all the other requirements, if it's not helping me bomb down the mountain then i'm not likely to ride it
COST: With all those requirements there is no way that this binding will be cheap enough to mass market. The highest end bindings top out anywhere between 300-350 and they have proven performance from companies we trust.