I'll paraphrase the quote as best as possible:

"You asked the question what other things have we got planned for the future, we can't give you any complete solid details right at the moment but uh we very much want to do as much with the game and franchise as possible. There's another certain console out there certain people may be thinking out sounds a little bit like you guys, your name "Twitch". I think we'll just leave it there. (someone in the crowd "woooos!" in celebration). I mean everyone on the Final Fantasy XV team loves this specific console, it sounds a lot like "Twitch". So you uh maybe might want to think something about that in the future."

What if they actually got FFXV running on Switch though?  

I'll paraphrase the quote as best as possible:

"You asked the question what other things have we got planned for the future, we can't give you any complete solid details right at the moment but uh we very much want to do as much with the game and franchise as possible. There's another certain console out there certain people may be thinking about, sounds a little bit like you guys, your name "Twitch". I think we'll just leave it there. (someone in the crowd "woooos!" in celebration). I mean everyone on the Final Fantasy XV team loves this specific console, it sounds a lot like "Twitch". So you uh maybe might want to think something about that in the future."

Sounds like this will be probably it's own version, I think what SE may be doing is making a general "Switch" engine which can run downgraded versions of their PS4 games more less.