the chipset issue is Two Part.
Meltdown effects Intel, as it allows access to Kernel memory and is capable of reading the entire physical memory of the target machine. As Tech articles state, Script-kiddie can do this and the most dangerous part of it is how you can spool up a cloud instance, hack that, then access machines within the same physical environment.
Spectre effects universal chip architecture, Intel, AMD, and ARM. This is significantly more difficult to exploit, but cannot be patched and will require a complete chipset architecture redesign.