There's a lot more tools and options out there today than there was even 15 years ago. That's good and bad. Good, because when used properly they let us climb faster, safer, and more efficiently then we could in the past. Bad, because when used poorly they slow us down, create more weight, clutter, opportunities to f'up.
I like to take an open minded approach to climbing. Show me what you got, and if I like it I will adapt it to my system, but don't sell me the shiniest new $100 belay device if it won't seriously improve my systems.
Modern gear will never "out-date" the hip-belay.