Video games are having easier options. They are not simply "getting easier."
Video games are becoming more mainstream, and more people are wanting to play them. Not every gamer is a hardcore thrill-seeker who wants to spend 50 hours playing through a game that would take 10 hours if they didn't die so often. Some of us, including myself, want the experience more than the challenge: I don't look back on Bioshock or Okami and be proud that I finished it, I look on their incredible artistic merits and say, "That was an amazing experience." Difficulty doesn't factor in at all unless I go back again to challenge myself with it.
Point being, if you think games are too easy, crank up the difficulty. You don't have to play everything on easy mode.
And as for Pac-Man, the focus of gaming has changed. Pac-Man was never about beating the game. Ever. In fact, if you get far enough in Pac-Man, you eventually just get a kill screen: the game glitches out and becomes unplayable. The point of the old games like Pac-Man is not to get to the end, but to get as many points as possible. That focus has changed now, and thus difficulty is a much different beast. To compare an old arcade game's difficulty, where the goal was to get lots of points before dying, to a modern game, where the goal is to get to the end of the story, is to misunderstand the goals of arcade games versus modern video games.