I'm also of the opinion that much of what changes over time is stylistic and cultural rather than necessary. People think that their parents' and grandparents' clothes look dated and press on to find the new, cool look. In the end, it's a bit like consumerism-driven cultural changes more than anything.
I am further of the opinion that we've already reached a good technological peak in that all human needs can be met currently if we decide to put resources into it, although we can certainly find refinements and efficiencies in existing technologies. The limit isn't reached, but we might not really benefit from more. Rather, we should be focusing on improving the human experience instead of chase the next great thing.