2. The Invisibility Cloak (Harry Potter and the Sorcerer's Stone)
We may be a bunch of muggles -- well, some of us may be, anyway -- but that doesn't mean we aren't entitled to certain magical pleasures. And yes, I'm talking about real magic here, not the heavily air-quoted kind that Apple sells.
One of the coolest creations to come out of the Harry Potter series is undoubtedly the invisibility cloak. First seen in Harry Potter and the Sorcerer's Stone, the cloak lets Harry creep through any room without being seen. Just imagine the things you could do with that device (and keep your mind out of the gutter, pal).
Researchers have been talking about a real-world version of the cloak for years now. From the looks of it, though, they may need to learn the Accio spell: Thus far, the cloak has yet to actually apparate into our lives.
3. The Neuralyzer (Men in Black)
Also known as the "flashy-thing" (and sometimes the "flashy-thing memory-messer-upper"), the Neuralyzer helped maintain a sense of calm in 1997's Men in Black and its 2002 sequel. Agent K and Agent J -- aka Tommy Lee Jones and Will Smith -- used the device to wipe the memories of anyone who encountered an alien or had a run-in with the top-secret M.I.B. team. Only a special pair of protective sunglasses could keep you from getting flashy-thinged into blissful oblivion.
I'm not saying there'd necessarily be an ethical way to use this, but I'd be lying if I said there weren't a few moments in my life when I wish I had one. Speaking of which, put on your glasses...