The most staggering figure is the projected influence MMOs have in the overall online gaming industry. A report by ABI Research claims, "The MMO market is expected to be larger in 2010 at $7.6 billion, but will show a lower CAGR of 12.8%, reaching almost $14 billion by 2015." Although the report downplays MMOs, this does mean that over half the revenue for online gaming this year will come from MMOs, and the total MMO revenue will potentially double in just five years.
Games through connected devices, like the PlayStation 3, have promising potential as well, according to the report. This bodes well for cross-platform games like DC Universe Online, but the report also says that console online games will only make up 10% of the total online gaming market.
Next time your parents tell you that video games will never amount to anything, you have a couple of reports to show them that claim otherwise. But good luck convincing them.