My vision for the future is something along the lines of having lots of solar panels all over the world maybe nuclear power plants too. There would be towers for food to grow in. Likely locally, but can be further out.
Everyone will have a lot of robots working for them. People will slowly get used to not having anything to do. And the ones that don't will just have a horrible life. Causing people to be busy with more spiritual stuff since that can't be replaced as well as physical stuff.
I'm sure there will still be fighting going on though
not sure for what. I'm not sure what the animals will do.
As for limited resources. My initial thought is that it will be the people themselves that won't want to have everything in existence.