If your iPhone X is experiencing touch issues with the display you may be able to get it repaired for free. Also, some MacBook Pro are affected by problematic SSDs that can also be replaced.
No they are no the latest Bond movies! Sadly they are new security issues affecting a performance feature of modern CPUs called speculative execution.
Should I be afraid?
A little bit, it is one of the more serious issues that Apple has had with macOS. Anybody who has physical access to your Mac or can get to it through via screen sharing, VNC, or remote desktop can gain complete access to the machine.