I love The Elves and the Shoemaker fairy tale.

The shoemaker can't make enough shoes.

At night the elves come to help him, unbeknownst to him.

Wouldn't it be cool if they'd make software for you while you slept?

Write down your wishes, the system tries to fulfill them!

Such a system is proactive.

It could help come up with useful things that you didn't even know to ask for.

For this system to work and not feel creepy or manipulative, it must work only for you and be fundamentally aligned with your interests.