A bubble level is useless for drilling perpendicular holes in any surface which isn't level. The laser gizmo would help whatever the angle of the workpiece. The idea of building the laser(s) into the chuck seems appealing but would it be durable enough?
My DeWalt cordless drill has a built-in LED which comes on when you press the trigger to illuminate your work. Unfortunately, unless you have a very long drill in the chuck, the chuck casts a shadow exactly where you don't want it. A good idea but poorly implemented.

Phil.