Google's Urs Hoelzle announcing the contribution of 48V and rack design at OCP summit was the news of the Summit.
Google's contribution is posted here.
Why is 48V a big deal? if you are pushing higher performing chips as Google's Urs Hoelzle has discussed in his paper on the need for brawny cores vs. wimpy cores. There is a need for GPUs as mentioned in the post.
As the industry's working to solve these same problems and dealing with higher-power workloads, such as GPUs for machine learning, it makes sense to standardize this new design by working with OCP. We believe this will help everyone adopt this next generation power architecture, and realize the same power efficiency and cost benefits as Google.
Why would Google contribute the 48V DC design? As one ex-Googler said at OCP Google wants to reduce the cost of the 48V DC converters and to do that they need more volume. And Google has a history of sharing its innovations. See the below timeline on Google's contributions