From what I gather is that they want to really build something like a small city within the airport, which would be an attraction and people magnet in itself.

From what I gather is that they want to really build something like a small city within the airport, which would be an attraction and people magnet in itself. Plus there are building convention facilities, which may or may not fill the hotels. A major problem that airport hotels will have in Zurich (including the Radisson Blu) is that the airport is a 10 minute train ride from the city center. Unless you have to be at the airport around 5am, or you are coming from a different city an airport hotel doesn't really make that much sense for ZRH. And even then a taxi from town will be significantly cheaper; even at Zurich taxi prices. That's quite different from CDG, or LHR which are relatively far from the city center (and relatively badly connected in the example of Paris), plus the fact that they are huge. So an airport hotel at those places certainly makes more sense.