Inventions I would like to see on the market ASAP

1 toilet paper rolls that replace themselves
2 easy and affordable sound-proof drywalling
3 smoke alarms that detect only smoke and NOT EVERYTHING ELSE EVER...

Oh wait, they have those don't they? They've just neglected to install them in this house. Hence the wake up call, the post, and my mood for the rest of the day. Awesome.