I already thought it was very suspicious that Sinclair's official press release just talks about how the remarks were "inappropriate and deeply insensitive" without describing anything about the actual remarks. And it even calls for the FCC to get involved?
What this really says is: you should be very afraid, because we will completely demolish if it suits us and we don't need a pretext.
I get what you're saying, but thinking about it, I'd be very surprised if the personal computing world ends up seeing anything like a paradigm shift that is so unprecedented it will catch the likes of Apple unprepared. And I realize it might sound arrogant or even ludditic to say this, but we'd need some sort of shocking new concept that no one ever came up with even in sci-fi. It's no longer really a matter of being able to technically implement something, but more about coming up with a human interface that is both totally novel and more convenient and practical than what we have now.
The qwerty layout comes from 19th century typewriters and we're still using it. The mouse was conceived of in the 1960s. Tiny computers that fit in the hand and voice operated devices have been utilized in early sci-fi works. And there's obviously VR, even though I think that's more of a toy than anything.
The only thing that is potentially in that same league of usefulness that I can think of is a brain-computer interface of some sort but those are currently so far away from having competitive practicality that there's a huge amount of runway.