As a kid, did you dream of Penny’s computer book from Inspector Gadget—and now you’ve got an iPad? Or wish you could just ask questions aloud or make commands and have them happen—and now you’re pining for Google Glass? Or hope for a day when you could send a “fax from the beach”—and you can actually just send an email from your smartphone? In many ways, the unthinkable is actually becoming the reality, as…