Yep I guess for home use normally expensive Small plastic parts would be a good use or for those who live out in the sticks like me even common plastic parts needed to fix stuff would be good.
But really
I think the elephant in the room is local shops with industrial grade metal capable 3d printers are going to be the most disruptive application of the tech.
Can you imagine a Home depot in say the size of a strip mall store or auto-parts store where you could just download the idem you want and then go pick it up or have it shipped.
I could see custom Auto Manufactures popping up like flower shops one day.
Hmmm come to think of it maybe not Home Depot, cement bricks stuff like that is not going to work well.