I don't think that some technological giant such as Google will relinquish control over its reign as the worlds top search engine. Well, if changes are necessary to the point that they need to make huge changes to their systems and business model, it will be just a cinch for them to adjust. If it really holds weight, the transition to a system that suits the need of a growing blockchain network can also be easily predicted by people at Google in advanced. This will enable them to slowly adapt and develop strategies to that direction.