The talk is about the LibreOffice Kit, an API that provides rendering and manipulation of documents and access to UI components. The speaker discusses improvements to the rendering of tiles, including the addition of a parameter for rendering master pages and the correction of an issue with overflowing content in calc. Other improvements include modifications to the algorithm for selecting a view for drawing slide previews and optimization of the render shape selection function to reduce rendering time for large images. The speaker also mentions the exposure of the formula bar widget in Calc to provide better handling of selections and cursor movements to the client application.