There will never be a McMansion big enough to warrant buying all of the super cool alarm clock concepts we've seen. So if you're in a cozy non-palace and only going to have one alarm clock, make it this one. The hours, minutes and seconds are displayed with only one laser beam and a bunch of mirrors.
This modern device, the Reflectius clock from Art Lebedev, looks more like a gemstone or a growing crystal, but it's a clock with a very cool, geeky way of doing things.
The unique body of the clock is actually an ode to it's science-y insides: It's "complex triangulated surface" is supposed to remind you of the "complicated trajectory" of a beam of light.
And inside, a single laser beam of light worms its way through 60 rotating mirrors to display the time in a traditional digital style.