Try PS3 or Wii. Even less RAM. Play Uncharted 2 or 3. On consoles memory is still important, imho. I worry about it too. And I think a lot of libGDX users too.
Memory is important and I think because programmers have such an abundance of it, we are wasting it. If you look back to gaming, games did not need loading screens and load times were nil. As time progressed, we got more memory and instead of making games more efficient with the technology, we just made everything a lot more bulky. We have to sit down and wait for almost everything we do now. I think about 30% of our time in front of the screen now is wasted on waiting for applications to start or switch phases.
It takes time to load textures/sounds etc o.o Of course this allocates more memory but as you can see on console there is a limit to it. Most texture seem blurry on console and clear on PC
So technology moves on and better graphics/sounds mostly need more memory -> loading time. I guess at least...