I’m personally quite interested in this mode and I feel like, for this setting, it’s a great idea (who isn’t fascinated by Ancient Egypt in some way?). Hopefully the mode is good and people get enjoyment out of it.
With that said, I’ve always been a little skeptical of the Tourism Mode being available in every game (although, as Shivoa noted above, there’s always been similar approaches somehow or another). I hope that it’s a lot of fun and, as Gray says in the article, that it becomes almost like studying, especially if twinned with developer or expert commentary (almost like the great Geop Let’s Plays of Assassin’s Creed 1 and 2). However, I could see the potential for this mode revealing the hollowness of the world, especially if it strips away the mechanics that might keep you looking at the crowd or planning your next approach.
I’m not necessarily against it, but I can see why (outside the context of a Gone Home-style game) a mode like this could not necessarily always be strong footing for a game to walk on.