Okay, seeing as we need to learn about an idea to say it, it reasons that the idea has to be invented. So how long before we have invented everything and discovered everything? I think that would be a long time from now.

Until then, we're dependent on new things like spaceships and games. Until then, we'll be talking about shlup's toenail clippings and the zoo I visited yesterday. or the time we didn't do anything important.

To answer your question, not for another 10k years imho.