Hate to be pessimistic but it's already game over and no amount of regulation can fix it. Google is where everyone searches therefore google holds the keys to the kingdom. Facebook and Twitter hold the social networks. Unless we are going to get increased choice then nothing will change and we won't get increased choice because they are already well established and anyone that tries to compete is doomed to fail (Google+, Bing). The costs involved are also prohibitive. What we can do is ensure they don't abuse their positions but that is down to catching them doing it, which is not easy in itself. It's also down to governments not using these platforms for their own dastardly deeds though we know they already do (Five Eyes etc...) as that then further reduces the chance of regulation.