I prefer colorful over green
To be honest I don't give a flying forget about the original fallout games, they don't even exist for all I care. If fallout 4 is a good game in it's own merit, then that's good enough for me.
I agree, its sometimes good for a game to put a franchise in a new direction, even though there are obviously some exceptions.
Fallout3's brown and green filter was hideous. The colors are welcome change, but the bright vivid colors remind me too much of Sunset Overdrive and Bio shock Infinite. The game also doesn't have to exactly follow a formula like Call of Duty where it gets to the point of being stale, but it shouldn't radically change to the point where it becomes something else like Dead Space and Command and Conquer.
Hopefully they add innovations from NV as well as some proper RPG elements like Damage Threshold and Armor Class without completely undermining the first person aspect. I also hope they bring back the classic slide show ending where they show how all your actions affected each person, place, and faction as well as your followers.