All told, we’re planning to showcase more than 40 games across PS4, PS3 and PS Vita.
Sony CEO Kaz Hirai recently said PlayStation 4 is “first and foremost” a game console, adding that “the most important thing we need to make sure we do, at least initially, is that we all agree and understand that the PS4 is a great video game console that appeals to video gamers. If we miss that part than I don’t think we get the initial establishment of the console."
Source: http://blog.us.playstation.com/2013/06/05/playstation-at-e3-2013-watch-it-live-starting-monday/
Although this doesn't mark how many of these 40 will be exclusives(besides the ones already announced), it still makes Microsoft's 15 games, seem kinda very slightly enormously small in comparison. Xbox-One doomed?
The answer is 9 hours, but only time will tell at E3, or when the console launches, but that kills the speculation doesn't it.