Its still bs. You have stuff like https://en.m.wikipedia.org/wiki/Avionics_Full-Duplex_Switche... already. For audio in a home setup? If your problem is arp or latency, you seriously barfed your setup (bear in mind you can actually use direct crossover configurations to deliver at least 100mbps, more than enough for many uncompressed high-bitrate streams). Audiophile is a niche market with many people with more money than brains, that more often than not, dont really understand tech.
