Sonic tractor beams, anyone?
Check this out:
Researchers at the Universities of Sussex and Bristol, in collaboration with Ultrahaptics, have now built a working tractor beam that uses high-amplitude soundwaves to generate an acoustic hologram that can pick up and move small objects.
The team is now designing different variations of this system. A bigger version with a different working principle that aims at levitating a soccer ball from 10 meters away; and a smaller version, targeted at manipulating particles inside the human body.
It could be developed for a wide range of applications. For example, a sonic production line could transport delicate objects and assemble them, all without physical contact. Or a miniature version could grip and transport drug capsules or microsurgical instruments through living tissue.
A more practical application might be a tractor beam capable of pouring a brandy, delivering said brandy to no particular blogger, and then levitating said blogger and brandy to bed.