They did make demonstrably false claims before launching. Games would run in 4k60, better than an XboneX, that laughable bullshit about negative latency, all the YouTube integration stuff, etc. Not to mention the forward-looking crap about scaling games across multiple hosts to allow completely new experiences and graphics quality better than the highest-end PC.
Credulous people believed this marketing BS just like they always do, same things are happening now with the XSX/PS5 storage magically transforming gaming, etc. Nobody wants to be “exactly the same as the previous generation except faster”, because you can’t differentiate from your competitors with exactly the same scenario. The real question is whether marketing exaggerations are actionable in court. I’m not a lawyer, but I imagine probably not.