Earlier this year, we saw Cut the Rope, Microsoft's featured IE9 HTML5 game which ran efficiently on Microsoft's latest browser. Since then, Microsoft has decided to team up with Atari to bring more "modern" versions of the games played in the 70s to your touchscreen and web browser according to The Next Web.
According to the report, the games (currently) would be "Pong, Asteroids, Centipede, Combat, Lunar Lander, Missile Command, Super Breakout and Yars’ Revenge" with games that will be added in the future.
The games were designed "with slightly-bigger screens in mind" and work more efficiently on "computers and tablets." The games produce "no lag" and have a "completely native feel."
You can try out the games that are currently avaliable at http://arcade.atari.com