The following video is part of our "Motley Fool Conversations" series in which Chief Technology Officer Jeremy Phillips and senior technology analyst Eric Bleeker discuss topics across the investing world.

Video game sales in December are out, and they're brutal. Hardware sales fell off a cliff while software saw a swoon of its own. In total, industry researcher NPD reports that the all-important month of December accounted for 23% of industry sales, well below the 10-year average of 28%.

While that's a bad omen for the industry, it also highlights the changing face of video games. As sales move online and home entertainment integrates mobile-centered operating systems like Android and Apple's iOS, game sales and other entertainment sales will be increasingly intertwined. That means the old ways of analyzing industry sales could continually become more meaningless.

Eric Bleeker and Jeremy Phillips have no positions in the stocks mentioned above. The Motley Fool owns shares of Apple, Activision Blizzard, GameStop, and Microsoft. Motley Fool newsletter services recommend Apple and Activision Blizzard. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.