Microsoft, along with OEMs, is working to improve cellular connectivity and power management features of Windows 10 to bring them at par with mobile operating systems like Android and iOS. They should reach the stable branch of the OS with Redstone 4. Windows 10 Redstone 4 is expected to be released in Spring 2018, most likely in March.
Along with OEM vendors like ASUS and HP, Microsoft announced a new generation of PCs. Powered by energy efficient ARM SoC Snapdragon 835, they run Windows 10 and can last up to 20 hours without charge according to Microsoft. Real world performance and battery usage under heavy conditions remains to be seen. Also, how Windows performs on ARM compared to iOS and Android is also an important benchmark.