Some of our core platform features, backend additions, and applications started as hack week projects. Every project you see featured in the linked video will be used. There are many more that aren't featured in the video that are more specific to a few customers; those will often be fleshed out and rolled out to individual customers to smooth out our customers' workflows.
Lekan is correct. We've added at least one major product feature every time we've had a hack week. There are also usually a few featurelets each year that start as hack week projects.
When I first started, I worked on Palantir Mobile, which had its origins in 2010 hack week. I was on the Palantir Video team that won last year and Doing It Live this year, both of which have become features under active development.