Video games are trivial to get published.
It really depends on the genre because the more locked-down platforms handle some genres better than PCs. Party games, fighting games, and cooperative platformers really need two to four players holding gamepads and looking at one screen. A PC can technically do those, but in practice, desktop or laptop PC's monitor isn't big enough for more than one person, and I'm told few people are aware that they can use virtually any HDTV as a PC monitor. The touch screen that ships with a mobile device makes certain genres hard to control as well, as I discovered when I repeatedly failed to make a certain jump in the demo of Pixeline and the Jungle Treasure on my first-generation Nexus 7 tablet.
ObMicrosoft: Look at the drama surrounding updates to Fez .