In all these cases the CPU isn't going over its designed temperature limit, so unless Intel are messing with those numbers too now (AFAIK the expected lifetime is based on continuous running at the maximum temperature, like many other electronic components are rated at) the lifetime won't be shorter than the spec.

(I'm curious if these new CPUs based on smaller processes do have a measurably shorter lifetime in practice; a lot of people can probably tell stories of decade-old Prescotts and such which are still in active use.)