Antennas still need to be big: Big enough to work and create the electromagnetic waves needed to communicate. It's one of the physical limitations of electronics that means that anything in connected tech can only be so small. But that could well change in the future. Research published in Physical Review Letters, have led to the theory that electromagnetic waves are generated not only by the acceleration of electronics, but also due to something called "symmetry breaking", where an electric field that's typically symmetrical, well, isn't. When electronic charges aren't in motion, this symmetry holds up, but when it starts moving, this disruption apparently creates electromagnetic waves -- these are what could lead to a new breed of tiny, tiny antennas and possibly a new generation of smartphone design and Internet Of Things... things.