How would a Socialist Revolution defeat Consumerism?

The biggest advantage capitalism has over any potential socialist revolution anywhere is that it throws an unbelievable amount of gadgets and entertainment at people. There is a good reason that both Cuba and the DPRK are trying to offer their citizens more and more western-style means of consumption (you can watch Frozen in the DPRK and they recently distributed smartphones due to a collaboration with an Egyptian producer): Because they very well know that the biggest threat isn't a desire for western liberal democracy but the lack of available means to engage in leisure activity and entertainment.

This wasn't a problem for the socialist bloc in the 60s or 70s. Yes there was Hollywood, yes there was Hard Rock and dozens of ice cream flavors. But there wasn't the Internet, there wasn't the same amount of narcissistic self-realization through commodified social networks. Today, people know very well that they won't ever be able afford to ride a Ferrari or make a party trip to St. Tropez, but it's not that - it's simply the desire to be part of the global in-group, to see which new fashions trend on Instagram or to be able to talk to your coworkers about how the last Game of Thrones episode was. Who cares about a shitty job and some pending bills or dreadful politics? Next week is Comic Con or the Burning Man Festival.

Now, if we look at Cuba or the DPRK, or just imagine any socialist revolution in future, it probably will be boycotted, sanctioned and attacked by the capitalist world. All the entertainment consumption industry, the 8956 flavors of nachos or the availability of some fancy cocktail recipes online, would be gone. I'd imagine that the young people would not support you for long. I believe this was the main problem for Deng as well. He thought after a decade of Cultural Revolution we may as well just allow some capitalism to build up productive forces without people turning back to commodity fetishism and consumerism. Well, today the Chinese are amongst the most consumerist and materialist (not in a Marxist way) cunts on the planet.

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Socialist revolution creates consumerism, it is all that is left in the cultural wasteland it creates.

Karl Marx talks about this (sort of) in Critique of the Gotha Programme

Why would you be upset about not having 10,000 television shows at 500 flavors of ice cream when you would have so much more leisure time? Not having access to such things is only a problem when there is no corresponding increase in leisure, with most production dedicated towards enriching a reconstituted ruling class, engaging in massive arms buildups, etc instead of meeting human needs.
Please define this phrase for me; I always thought it referred to the phenomenon wherein relations with other people in a capitalist society are viewed as being relations with the goods they produce, thereby leading to the attribution of human powers to commodities (for instance, so and so is valuable because of some innate quality, not because of the huge amount of labor crystallized in it).

Gardening, bowling leagues, sitting around in hammocks, and home cooking will win out over Netflix, lavish vacation packages, cheap candy, and fashionable clothing that falls apart after being washed three times?

Once you reach post-scarcity, consumerism becomes obsolete.

Anyway, what's that quote from?

Consumerism is defeating itself. You can't have a consumer economy without consumers, and the nature of Capitalist economics means that you can't create a body of consumers and then not give them wages with which to consume. Without a substantial cash infusion into the "consumer class," eventually the market is going to suck up more and more liquid capital and concentrate it into the increasingly narrow number of corporations and families that get the lion's share of everything.

Eventually, the consumer economy consumes itself.

Somehow an analogy to "fattening up livestock" seems exceedingly appropriate.

And that's why Porky is pushing for UBI already.