DALI Callisto 6 C wireless loudspeaker

PS Audio's Paul McGowan has been sending out a daily newsletter by email since 2011. In his May 29, 2019 epistle he asked, "What would our world of high-end audio look like if there were only active wireless loudspeakers? If even the half-a-million-dollar mega-beasts were internally amplified and connected via wireless and controlled from an iPad? No more boxes. No more wires and cables. Only speakers.