Valve’s hardware strategy up to this point has been to push into new markets via hardware innovation. So I’m very skeptical that the hypothetical successor to the deck is a more powerful version of the deck. They’ll let other hardware manufacturers push those limits and reap the benefits via software sales. The deck was exceptionally successful in that regard, it’s literally opened an entire market segment.
Whatever the “Deck 2” comes to be, I expect it will be poised to capture a different market segment, possibly AR/VR or even modular handheld hardware (totally unfounded speculation), but I sincerely doubt they have much interest in releasing a more powerful version of the same thing every few years.
Who knows, though. Valve’s gonna valve and the only thing they do with any consistency is change things up.