IMO, a more valid argument against its success would be that any consumer who is in a position to ensure they have fast enough internet for this service, is also in a position to buy a gaming console. But the counterargument to that is that there is no reason someone cannot have a gaming console and also use Stadia.

I'm normally very skeptical of Google's motivations, respectful of their cloud technology, and doubtful about many of their products. But I think this one will be a success, and shortly followed by competing products from Amazon and Microsoft.