I genuinely wish Apple could figure out a way to respectfully license and preserve his voice to make it the defacto voice of Siri so that my kids would grow up in a world where the intelligent, compassionate voice of Patrick Stewart would be actively associated with seeking, reaching, and exploring knowledge. I know everything nowadays is painfully, annoyingly AI slopped, but I mean this as a long-standing way to preserve his legacy and celebrate what he meant to all of us. That's why it could only be a steward like Apple and not some random-co.ai.
I think that his storied career in media arts is already a great preservation of his legacy and impact. There doesn't need to be more than that; we can be satisfied with what we have.
I always wanted Majel Barrett's voice. Apparently she did record phonemes before she died, but that's not suitable to properly train a modern TTS system.
The original incarnation of Android's voice assistant was codenamed after her.