Vulnerable to Spectre, yes, like nearly all speculative execution processors. The PS4, XBone and Switch are very likely vulnerable to Spectre all the same but that will probably mostly affect their web browsers.

None of these is vulnerable to Meltdown. That is an Intel/Apple/ARM Cortex A75 only thing.

It affects WAY more ARM processors than A75. All the fast ARM cores are vulnerable to one of the two meltdown flaws and half are vulnerable to a subset of the third flaw (with A75 being completely vulnerable).

https://developer.arm.com/support/security-update

> All the fast ARM cores are vulnerable to one of the two meltdown flaws

Do you mean Spectre? Meltdown is the Variant 3 in that link.

> It affects WAY more ARM processors than A75. All the fast ARM cores ...

The ARM cores listed on that page are not all the ARM cores in the market (or running in the real-world). There are many more ARM cores than listen in that table, and the page says any ARM core not listed in that table is not vulnerable to any variant of Meltdown or Spectre.