Could the OASIS become a reality?
Could the OASIS exist in real life? We have virtual reality headsets - the strangely named Oculus Rift is one of the current products on the market, and online gaming is well established, but could the OASIS - a vast virtual world where you can do anything/be anyone - become possible? And imagine if it were possible, the social ramifications could be huge.
If you think about the power of social media, online gaming, streaming tv/films etc - people are already addicted to their cell phones, imagine what the OASIS would do to so some people. They'd never meet anyone in real life! You could spend your entire life in a virtual world.
One major downside to the potential of virtual reality is the health side-effects. Headaches, severe eyestrain are a common side-effect from using VR. I think this is the biggest obstacle to overcome. No-one mentioned headaches in Ready Player One! "Hi, my name is Wade. I have excruciating headaches all the time because I live in the OASIS."