> The reason consoles are safer is that you can't do any dodgy downloads on them beyond the manufacturer's walled garden, similar to how mobile devices work, not because they have magic security pixie dust making them invulnerable to malware, especially since they share the same X86 hardware as PCs.

That's not the whole story. The Xbox takes sandboxing very seriously, and provides isolation way beyond a typical PC. See for instance [0]. Recent generations of Xbox and PlayStation have been based on AMD64, but I don't see that this is a major factor.

edit It's a pity they don't offer decent keyboard+mouse support. Being able to use a console as a serious desktop web browser would be a very useful feature.

[0] https://youtu.be/U7VwtOrwceo?t=1180