Is apartment investing changing? Will it affect the economy?

Lately, I've been hearing that more people (within the real estate investment world) are interested in transitioning from investing in single family homes to investing in apartments.

There are, at least, a few reasons for this.

• Apartments generate passive income.
• You only need to worry about the maintenance of one building while still collecting many rent payments.
• It's getting more difficult to find great investment deals with single family homes--since so many investors are looking for them now. Fewer people are looking for apartments; so theoretically more deals can be found with less searching effort.

However, I just read an article about apartments that might shape--not only apartment investing but also--companies in certain neighborhoods.

Here is the link to the article "No McMansions for Millennials"
http://realestate.yahoo.com/promo/no-mcmansions-for-millennials.html

It does not address investing; however, I think there are investing-oriented takeaways from this article.