Buying a PS5 now only makes sense if you just want to play the back catalog of PS4 exclusives with better load times / graphical enhancements etc.
I disagree, it's a terrible reason to spend £450 on a new console. The improvements are, for the most part, just not significant enough to warrant it for that.
Do you think the silver Samsung smart remote will be able to control the PS5? It used to work on XB1X.
The PS5 uses HDMI Control so as long as you have the equivalent setting enabled on your TV, it'll pass through any commands from the TV to the console.