I think what worries me about the hyperbole on this linked page is that it implies all problems software solves are fundamentally similar (they're not), or that all software shares certain fundamentals (it does of course, but at such a low level they are hard to abstract). The range of problems it says they want to tackle is huge:
They want to make a better excel
They want to make a powerful, intuitive, database UI
They want to make a tool scientists can use to crunch and visualise data
They want to make a game programming language for kids
They want to make hypercard with modern programming languages backing it
They want to make a tool for professional programmers to focus on the hard problems
Any one of those is an admirable and difficult goal - trying to make all of those things at once is a good recipe for starting something and never finishing it.
That's not a reason not to try to improve programming practice with something radically better, but I think they'd be far better to pull a Buchheit here and focus on one small set of customers and make them very happy, instead of over-promising and under-delivering.