Bcoz Windows 98 require 66 megahertz (MHz) processor, 24 MB RAM and 200 MB hard disk space whereas Windows 10 require 1 gigahertz (GHz) processor,
1 gigabyte RAM and free hard disk space of 16 GB. So can you Run windows 10 on Windows 98 hardware ? :no
So I think H265 they require latest chipset that means replacing 2 crore subscriber's STB for each DTH player and that will costs more money than they are currently spending on TPs