* A . The display isn't really there, it's just beamed into the air like Princess Leia. You can manipulate on-screen objects by inserting your hands into the display.

* Or how about the "," which is a high-def, high-powered PC that uses a stack of paper napkin-sized wireless displays?

Why does this happen only on gadget blogs?

Why don't food blogs show, say, a computer-generated picture of a slice of chocolate cake, then explain that this "concept" is the most delicious dessert ever created and provides complete nutrition with zero calories!

Why don't real estate blogs show computer-generated palaces, then tell you they cost only $5, then appreciate by 1,000% every year forever?