Big red button (with a world of possibilities)
Every home of the future needs a big red button like the ones you find in space ships to self destruct or the ones in nuclear subs to launch WMD (if they existed) or to sound of sirens in the house as a panic alarm. Imagine the fun you could have.. You could put it in a breakable glass box with "Warning do not press this.button" and then link it to some elaborate systems of pulleys and gadgets to catch the person who pressed the button... great for catching burglars or over curious kids both of whom like pressing red buttons.
I would have mine at my desk linked to a really loud siren that couldn't be turned off by the button, so the first person who pressed it would frantically trying to use the button to switch it off... alternatively you could be practical and link it to fireallarm/emergency services/ help I've fallen down and I can't get back up... but it has to be red... I understand the commissioner has one of the preorder samples and has already linked to the batphone (but has had to paint it red before use as red is not currently avaialble)
Jamie Roberts commented
I can build you a big red button that pushes a Flic if you'd like, I make custom things for people for a living. I like the idea of larger items that the Flic fits into, your big red button, some kind of timer for logging time so there's a real display but the Flic is also pressed so triggers a counter which is logged somewhere, a child's toy which makes things in the room change when you squeeze the hands and feet, that one's actually pretty simple to DIY. Still the concept is solid. Get in touch if you really want a red button.