According to the company’s changelog in the Surface Pro 4 Update History support page, these are all new improvements and fixes:

Surface Embedded Controller Firmware: 103.1684.256.0 improves battery life during sleep. Intel Precise Touch Device: disables touch when cover is closed, and improves stability. Surface Integration: adjusts system Hibernation defaults. Surface Touch Servicing ML: 1.0.724.0 optimizes touch functionality. Surface System Aggregator: 103.1610.256.0 resolves screen brightness issue when device comes out of sleep. Surface UEFI: 106.1624.768.0 refines brightness settings. Surface Touch: optimizes touch functionality.

The new May 2017 firmware update for Surface Pro 4 will download and install automatically. However, if you have not received the update on your Surface, then go to Settings > Update & security > Windows Update and try to force the download manually.

Surface Pro 4 | See at Microsoft

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