"Our stress test with the tools Prime95 and FurMark (at least one hour) on mains is not a big challenge for the ThinkPad T470. Thanks to the increased TDP limit, both components can maintain their maximum respective clocks over the course of the review. [...] The two CPU cores maintain the full Turbo Boost at 3.1 GHz and the graphics card 998 MHz."
Also, this will only further increase the value of maintainable machines. A machine with good and accessible/serviceable cooling means that redoing the thermal paste after 3-4 years will be both feasible and helpful.
