Today Only in Computers
An omen is an alert that something's coming. In this case, what's coming is a cool computer.
Gaming is now something that everybody does. Literally. Everybody. It's so popular that there are even debates if certain video games are actual video games. Like, today Pac-Man would be called a game for "casuals" or something. It's a new world! You need a machine that lets you play the new games! Otherwise you'll be trapped in the past. Sorry, in "retro."