Grafana v4.4 introduces several new features and enhancements, with the most notable being the Dashboard History feature developed in collaboration with Walmart Labs, which allows users to implement version control by saving and comparing dashboard versions. This update also includes enhancements across various integrations such as Elasticsearch, Sensu, CSV, and the Table Panel, as well as a new DingDing Alert Notifier. Additionally, minor improvements have been made, like an option for result set size in Elasticsearch, while bug fixes address issues such as negative values in graph histograms. The release acknowledges the contributions from the Grafana community in submitting pull requests, bug reports, and feedback.