Bill Gates:

Bill has never designed a game or not exactly like a gamer, but he and his platform has always been the strongest  supportive backing in all time. From the earliest days, Microsoft has started to support PC game and publish game, they brought out bunch of famous known game engines and publishers, also provides game developers a  platform to free their minds on creating genres and being innovative on game design.
Through these years, bill was always there point game design community a right direction and giving them encouragement, meanwhile, making continuous changes on the MS-DOS and windows operating system to adapt to the fresh needs from game industry. therefore bill with his Microsoft has never stop to contain the new technologies into the operating system and keep conquest all sorts of difficulties all together with the most of game developers.
Nowadays, console industry is amazingly developed and grown up become ever strong, bill and his company never fall behind of the evolution, they launched xbox and xbox 360 console which helped a lot of PC user or gamer to smoothly jump from PC platform to a console platform.
All along the journey, i think bill made these investigation on gaming just because of he likes game, and his recognition on the gaming history reinforced its growth, and bill with his trustworthy system could never be neglected as the most important part of gaming development history.

Mark Z:

Mark is a genius hacker and understands what people likes his age needs the most. Differ from Bill Gates, Mark has planted a social network platform on gaming industry, it seems tiny small and can be totally submerged among the whole strongly developed game industry, however, nobody ever dare to not to integrate Facebook based game in game industry, and nobody ever stop playing those games on Facebook.
Obiviously, Mark established a world wide net socialized community, the Facebook, so just the game published inside is socialized as well. instead of leaving message, publish photos or sharing information, Facebook game became another way to social and convinced people to be connected from everywhere. Because of Mark's contribution, increasingly numbers of people gets to play web-based free game, large scale of game designer comes to endeavor in the design of web-based game.
Mark is a smart guy to earn money not only from the website he creates but also from the potential of web-based game developing.

Bill Gates and  Mark Zuckerberg are all make huge impacts on gaming industry that nobody could exceed, thanks to their contribution, we can have so much fun in our daily life.