"5G" hardware in a mobile device will be useless, and I doubt it would ever be available or installed in any mobile devices before the mobile operators actually deploy "5G"-capable wireless networks.
Europe (and the UK) might start deploying "5G" in a few years but the USA is at least half a decade behind in terms of actual wireless infrastructure - they still haven't even got "100%" 3G/HSPA+ coverage, let alone full 4G/LTE or LTE+ technologies - and here in Canada we're kept under mobile data shackles by a Big Three oligopoly which is in no hurry at all to spend money upgrading anything.
5G Laptops are all pretty but in practice there's just no 5G networks anywhere that they can use.
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