Data is still preliminary for "total consumer spend on gaming content via all monetization methods, including new physical video and PC games, used games, game rentals, subscriptions, digital full-game downloads, social network games, downloadable content, and mobile game apps," however, the market research company puts complete spending between $15.4 and $15.6 billion.

Physical sales still led the charge in 2010, generating revenues of "$10.1 billion, a 5 percent decline over the $10.6 billion generated in 2009." One might speculate that were the biggest sellers of the year--Black Ops, Madden NFL 11, Halo: Reach, and New Super Mario Bros. Wii--available as digital downloads across all platforms at launch, the gap between physical and digital could have been much smaller.

According to the NPD Group, Call of Duty: Black Ops was the biggest selling game of 2010 (new physical retail only, including PC), pushing "more than 12 million units" out the door since its launch in November 2010.

Top Selling Games of 2010 (Combined Platforms, New Physical Media)
1. Call of Duty: Black Ops (X360, PS3, Wii, PC, NDS)
2. Madden NFL 11 (X360, PS3, Wii, PS2, PSP)
3. Halo: Reach (X360)
4. New Super Mario Bros. Wii (Wii)
5. Red Dead Redemption (X360, PS3)
6. Wii Fit Plus (Wii)
7. Just Dance 2 (Wii)
8. Call of Duty: Modern Warfare 2 (X360, PS3, PC)
9. Assassin's Creed Brotherhood (X360, PS3)
10. NBA 2K11 (X360, PS3, PS2, PSP, Wii, PC)