Can’t attend Apple’s WWDC 2013 Keynote, then you can watch the live stream here. Just make sure you are using Safari 4 or later on Mac OS X v10.6 or later; You can also watch the Live Stream on any iOS device as long as it’s iOS 4.2 or later. But if you are going to watch it on your Apple TV, just make sure you are using the second or third-generation Apple TV with software 5.0.2 or later.
Of course it won’t hurt if you try watching it using a non-Apple products, though I’m pretty sure you need to have the stated requirements above in order to watch the Apple’s WWDC 2013 Live Stream. The event will start 10 AM Pacific Time.
If you still cannot watch the Live Stream for some unknown reason, then just follow @KabayanTech since I’ll be live tweeting the event!