I think it's pretty easy to laugh topics like this off, but I think it's legitimately a problem, especially for many younger people.
I used to play video games so excessively that it was pushing 40-50+ hours a week. It got to the point that I'd play video games instead of spending time with God in scripture, attending church, or attending Bible study groups. It also caused me to nearly flunk out of college.
In my case, video games were most certainly an idol.
Note that video games are still one of my biggest hobbies even after fixing my priorities, but I really only play on average two hours a day now (not that there's anything inherently wrong playing more than that)
Video games are a form of entertainment, just like movies, television, and books. Nothing intrinsically idolatrous about it. But anything can be turned into an idol is we put it above God.