Would it be possible to have viewing galleries inside the hotels, restaurants, and shops? I think it would add to the game. It could add a new dimension to the game and make it an even more immersive experience.
Remember that making all those interiors would take a lot of hard work that could be used elsewhere.
Hotel? Maybe yeah that could be interesting to have an inside view since it's already a viewing platform of sorts. It would add to the immersion. Right now the viewing in hotels is a bit restrictive. Having a bit more freedom there would be very nice.
But I don't think an interior for restaurants and shops are needed.