To be clear, he didn't mention Mac Pro, just the Mac Studio... they can cancel the Mac Pro line anytime, whenever they want.
He didn't mention the Mac Pro because it is a future product. Official Apple policy is not to talk about future products. This guy is a non executive Vice President ( i.e, one of a several vice presidents ... VP here is an inflated upper management title that gets tossed around ... not Vice President of a Country like VP where there is only one.). He can't speak for Apple as a whole. Nor is this a extremely scripted , carefully crafted Apple large event utterance.
Since he can't talk about the Mac Pro not saying anything doesn't indicate one outcome or another. Apple can cancel the whole Mac product line whenever they want. It may not be probable , but it is possible.
Pointing at the Studio utterance is essentially misdirection. The only named Apple Silicon Macs are going to be the ones they have already released. The Mac Studio was the last major Mac subgroup released. ( Apple pretended at the Mac Studio release that they were done with the Mini's transition so the Mini Pro isn't part of the 'range' of Macs to make the transition).
The part that the headline really is leaning in is
" ... that our goal is to take our entire product line to Apple Silicon. ..."
'entire product line' . If go to Apple's Mac marketing web page
https://www.apple/mac what do you see? The Mac line up. You can stand on your head and invent something different but the more likely meaning of the "entire (Mac) product line " is just what you see there.
What is not being 'doubled down on' is any 'about 2 year' timeline to finishing. Obviously that is blown at this point. And they are not setting another 'approximate line in the sand' deadline.
" we intend to do"
is likely an allusion to some Apple Silicon that they have haven't finished (or are immediately ready to release yet). May not get the long rumored 'quad die' solution but stopping at just two chiplets doesn't really make much sense given the phrasing Why would Apple need to 'intend" if the Mac Studio was the end of the line on performance?
"intend" has a future connotation to it.
"... We believe strongly that Apple silicon can power and transform experiences ..."
That probably means they are tapping out on the Ultra level and quitting. That doesn't mean they are out to make a Epyc/ Xeon SP / Xeon 3400 / Threadripper / 4090 / 'killer' SoC. Just that they are out to pack as much transformational 'power' into Apple Silicon packages as skill and technology allows. It probably isn't going to be the most extreme power consumption possible. But the Mac Studio probably isn't the 'top' end on performance breadth either.