When does a 'visual tour' (or whatever a virtual house showing is called) become a game? Collect all the coins? Use a crowbar to break up the crates in the garage?
If the purpose of the 'visual tour' is to showcase or advertise another product, then it will fall under the new rules, no matter how many gameplay elements you add.
If the purpose is to be a standalone product, then it counts as a game.
The fact that, after the recent communication issues/attempt to pull the rug over the entire industry (depending on whom you ask) by Unity, Epic didn't prepare a detailed and easy to understand page explaining this topic in detail, rather announcing this in a speech, is somewhat disappointing and shows an apparent unwillingness to learn from their competitors missteps.
The pricing change hasn't been announced yet. This was an announcement of an announcement.