Unfortunately, the Banksian vision of the future requires two things we haven't achieved: eternal benevolent dictatorship, and post scarcity. Furthermore, he also posits that for something like the Culture to emerge, civilizations need to be mobile (ships) in order to be unconquerable.
The closest we could do with current tech is some sort of Waterworld type thing in international waters with flotillas that are inherently sovereign. But the earth is small and it wouldn't last. Plus, nukes.
Um, can confirm. We call it post-scarcity communism and is an ideal where everyone can get what they need (and plenty of extras to keep them happy and comfy) automatically printed for them, and we'd provide for the acceptance and safety of every behavior people are interested in, even those that are countercultural.
This is the togas and spires utopia that is used in political theory as a far-off ideal, though it doesn't necessarily have togas or crystal spires (much the way Mars colonies are signaled with domed cities on Mars)
What is interesting is how the capitalists don't really have a notion of a globalized ideal. They personally want to be rich and live in luxury, but also want a fiefdom teeming with obedient serfs. The stratification and labor is built into the ideology, even if they automate the bottom tiers, there will always be a laboring underclass that is required to suffer for the pleasure of the aristocracy.