It is a very interesting initiative, but I do see possible downsides:

If the seat in front of you reclines twice as far, you can no longer watch your movie (As it is it is already difficult for tall people such as me)

10% extra sounds great, but again, the double recline of the seat in front of is no fun if you are tall, and it will make you feel as if the person in front of you lays his head in your lap!

Unless, of course, special seats are implemented to deal with this.