There's never going to be a point at which we say "all done, let's sit back and relax now". For starters, that would require the whole population of the world agreeing on what the ideal world would look like, and I think we all know that's not even remotely possible. Also, generally speaking it's not in human nature to be content (individuals can achieve this, although most don't) so even if we did all agree then once we got there, we'd want more.
This is partly why I'm very individualistic in my approach to life. Even if you defined and created the perfect society, people would still be dissatisfied and want something more / different. There's no objectively ideal way for society to be run which is why it tends to always be defined by conflict between different ideologies.
To comment on the examples you gave, I don't find living indefinitely in this world particularly appealing and there would inevitably be some downsides. People no longer needing to work would depend on the generosity of those in power (or the general populace) rather than the tech available per se. I mean, it's not like everyone is working to create enough food for the world population to survive so we could easily survive with most people doing jack **** now. The processes involved in producing food / clean water / housing etc would still be owned by someone, and they'd want something in return. That's before you consider how anyone would pay for something that is deemed non-essential if no one is working (this is basically why socialism / communism isn't a good idea, but that's not something I'm keen to get into again).
