Sure, there are in any of the global cities. I'm in the DC area, so I know plenty of people who have money and live in apartments/condos. NYC is the same way. There are plenty of people in the Bay Area that this describes as well. And then you talk about Western Europe and Asia, and home theater setups are a lot less common.

Even if you have a lot of space in your apartment, it's hard to justify much of a home theater setup, as you will be really limited by sound issues.