With Google I/O being held at an Amphitheater, there are rumors that we could see anything ranging from Google's driver-less car, to a Google branded drone show up during the event. We should also see Android N make an appearance. Already, leaked images of the next Android build have started showing up.
If you're interested in attending Google I/O, beginning on March 8th you can register to get an opportunity to buy a ticket. From the large number of those who register, Google selects a lucky few to attend. Tickets last year were $900, with those in the field of academics charged $300 to get in. We will have more information as we get closer to the start of registrations next week.
If you can't make it to Google I/O, you can always follow our coverage of the developer conference. Additionally, Google usually releases a very good app that includes live streaming of certain conferences.
source: Google via AndroidCentral