anti gravity devices for use in cosplay

something that ends capitalism

memory wipes?

The secret tonic that turns people into animal girls

PENIS EXPLOSION

Plasma rifle from Halo

contingency explosive device that destroys earth, finally

The ability to turn people into furries and/or an animal/human hybrid(catgirls, catboys, foxgirls, etc)

Also some way to more easily transition

more advanced robots and quantum computing

A rich people vorer. Or a 3D printer that prints with any kind of material and doesn't require any energy source or filaments, and can print itself, to hurt tHe eCoNoMy. Or just nothing because we can't have nice things

The ability to make porn more accessible. Like you see a milf and she's now yours.

ability to love

I don't know.

AI-based targeted disinformation.