It isn't an exactly appropriate comparison with Tabletop RPGs and Video Games. The better comparison would be Tabletop RPGs and Video Game Platforms.
The video game platform is a finite system that is designed to provide the means of running vast quantities of content. The video game platform fundamentally hasn't changed in many years. There have been many tweaks on the way, but nothing too earth shattering.
The Tabletop RPG is really the video game platform. Grab a module, create some characters, and have an adventure. A majority of the content is provided by the people playing on the platform. Many RPG's include some built-in content, but it really is up to the players to bring the rest. It's like all the online drama that EVE Online (Sci-fi MMORPG) has. It was NEVER in the game itself... the players brought it and the game facilitated it.
I do think the Tabletop RPG industry is suffering a bit of the same aliment that the Video Game industry is suffering... "Genre Obsession." The Tabletop RPG Industry can't seem to get away from Tolkien fantasy, much as the Video Game industry can't get away from First Person Shooters. Both Tolkien Fantasy and First Person Shooters were the first ones to really attract the big crowds and push the innovation bar, but now they are EXTREMELY commonplace. BUT... they draw in the money from the general public.
The game system has changed but the content is roughly the same. Wizards of the Coast has practically the same DnD content with a different system in place... Much like Nintendo has the same lineup content with a different system in place...
It's going to be up to the independents to bring in something new, since the current companies are too dependent on the money to experiment anymore.