[quote name='ProfWho']It is what is known as a legacy input. Last I checked they also have composite cables as well it doesn't mean that they are not dated. 7.1 surround and the high quality surround standards tend to not support TOSLINK. On my tv, it passes through that is what the ARC is for. That said if you are dealing with an HDMI device why would you hook it up to your TV over your receiver since receivers tend to have more HDMI inputs.[/QUOTE]
"Legacy input" or not, current gen games and the specs for next gen games show that optical will be included. Wii U doesn't. Nintendo never included them with any of their prior systems either. They were behind the times then, and they're behind the times now. Fact is, aside from an HDMI, the Wii U has no audio hook up - unless you count the headphone jack on the Gamepad. I plug my consoles via optical to surround sound headphones, not a speaker system. Hence, the requirement for optical.
Though, I guess I should have waited until 2019 for the Wii U 2, by then Nintendo might finally catch up and include an optical, seeing as how they just caught up to HD.
When every high-end blu-ray and DVD player currently has optical and a supposed 'next gen' system doesn't, that's an issue. "Legacy input" or not. And further, it's not like Wii U is next gen anyways. Spec wise, it's current gen. So it should have current generation inputs.