Don't have time to read it all but the abstract states,

"With our research, however, we are focused on the phase thereafter. Once optical interconnects and interposers have been fully established and are the main mode of inter-chip and intra-chip communication, solving the 6× inefficiencies... "

Therefore this paper is more about a computer architecture that will be in place AFTER general purpose hardware swaps from electrical to photonic communication, but we aren't there yet. Also seems the paper is more about tackling the next phase of `energy efficiency` problems that will arise after the swap.

Still useful info to consider but i agree with most here that these click-bait titles in research are abused. But I can't really argue it got me to click ;)