Some would argue that the drive to improve video game technology also improved computer output the last 20 years. Smaller, cheaper memory was developed in a short amount of time. Video cards and 3D rendering of polygons would not be as advanced. While we may have CD's for our music, DVD technology probably would not have come out for several more years. It's hard to imagine what the effect the lack of video games would have on the internet. Without LANs we would not have as much networking. Internet speeds would be less of an issue. Dial up would be a common thing. High speed internet a luxury that is rare. Most cell phones would NOT have applications for everything. Cell phones would be larger, clunkier and have bigger batteries (but not more efficient batteries). Oh, and they would be more expensive so fewer people would use them.
Movies would be alot less flashy. Special effects involving CGI wouldn't be around. Stuff might live up to the Star Wars standard, but most special effects would have to be done on models to scale. On the bright side, episode 1, 2 and 3 would never have been made, so that would be a nice added bonus there.