custom hardware is nice, like a ps5 or something, but this is usually built up from somewhat known component. a lot of hardware is not too bad, but the software has the main issues. i dont see gaming companies develop custom security hardened hardware quickly due to extreme costs related in making very advanced and fast chips.
ultimately a combination would be best, hardware tailored to be secure and allow secure software to be developed for it, but the same can be said for phones and pc's etc .
most modern cpus have quite a lot of hardware security features which are often not ideally implemented or not used. they also offer features that can allow software to enhance security, bit that is also rare.
for example you _could_ use certain extended cpu registers to allow for taint tracking etc, but this likely kills game performance, and is not even done for trivial applications despite being proven to mitigate entire classes of vulnerabilities. (its quite complicated to implement too as the hardware isnt taking into account such features for such purposes)
ultimately a combination would be best, hardware tailored to be secure and allow secure software to be developed for it, but the same can be said for phones and pc's etc .
most modern cpus have quite a lot of hardware security features which are often not ideally implemented or not used. they also offer features that can allow software to enhance security, bit that is also rare. for example you _could_ use certain extended cpu registers to allow for taint tracking etc, but this likely kills game performance, and is not even done for trivial applications despite being proven to mitigate entire classes of vulnerabilities. (its quite complicated to implement too as the hardware isnt taking into account such features for such purposes)