I feel like Stadia (or something like Stadia) is gonna look more attractive when next gen arrives if anything.
Being able to play next gen games on your TV in 4K/HDR without needing to drop $400 on a new console? That's not appealing?
You can be watching a Digital Foundry video and just click a little play button next to the YouTube video and play the game straight away. Streaming RDR2 now or whatever sounds cool but I feel like it's gonna feel real impressive when we're dealing with games that would otherwise require a significant hardware investment otherwise.
But then all Sony or MS need to do is enable next gen game streaming on the old consoles and that selling point evaporates.