Anti fog devices are already developed lately and in recent times they are getting updates and media houses shows them as next gen achievement. Like we have new updates are better display, real time speed, distance of next signal, type of signal (home, outer, etc.), signal distance shout out, integration with GPS in real time, etc.
When KAVACH will be installed then we can have next signal aspects inside loco cab. Also speed detection, automatic braking, automatic slowdown as per signal aspect, etc. will be there.