I forgot about this thread, lots interesting answers. So a desktop CPU/GPU just isn't built for making the best scope or DMM. And if a dream team at intel decides to make a scope/DMM, they would probably just cook up a new chips then.
And yeah I'm impressed by the speed of the latest PC tech, but I forget, there are muilti-GHz oscilloscopes, that cost more than most houses in Canada.
I'm just reading the thread "Oscilliscope memory, type and why so small?", and it reminds me tho of some user interface limitations, that DMM and scopes still have vs the entire PC package, or laptop even. All my Siglent stuff can be plugged into the PC, but it's a long ways from if Siglent said, lets make a scope/DMM/PSU/AWG/etc , all in one box like a PC, with a big screen, and KB/mouse, and full GUI, for those that want more than command line stuff.
I'm sure the tech people from Intel/AMD meet up with the tech guys from Fluke, Tektronix etc, and think about this too.