As long as there are things that only people can produce (or are preferentially produced by people), and there is currency to be exchanged for those things, people will have jobs in one capacity or another.
For this reason, a pure socialist economic outlook is unrealistic. It will be some form of mixed economy, where automation dominates all major production, and human labor is invested only in small, bespoke products. (Like what you find on etsy)
To support that small, bespoke labor, a strongly socialized infrastructure would be required.
That is the future I see. I do not see the "glorious future" Marx tries to posit. Instead, I see a constant battle between the still imminently wealthy, seeking to continue getting wealthier, despite having exhausted the means they have used previously-- and moving past industrial captaincy, and moving wholesale toward capital gains based vehicles to grow their wealth.
Currency will still be a thing, because of the bespoke work people will be doing to stay busy-- and so the wealth gap will continue to widen, even with the highly socialized infrastructure.
It will still be unstable, but that is the future I forsee. Strained, and barely held together, and constantly endangered by idiots with rose colored glasses preaching about American Dreams, and "How it USED to be!", trying to rip the socialized infrastructure up from the ground, with the indolent, and highly wealthy upper classes egging them on for entertainment.