Since you are using power consumption and TDP as interchangeable terms, you clearly cant grasp how wrong your statement is.
Anyone can make a 4790K at non turbo speeds sip 125W. What was it's tdp again? :think:
88W 4790K could exceed 88W TDP or power for a certain period of time, but its ultimately limited to 88W, regardless of whether its thermal or power limits.
Surface Pro 4 Core i7 demonstrates that TDP = Power. It doesn't have to and TDP could have been > Power, but for a stable design and system you'd want to keep them the same. When they introduced Turbo Boost 2.0 with Sandy Bridge and package power could increase beyond TDP for a while, its only during the time when thermal headroom was available. After that they had to BOTH go back down.
Another example:
Realistic load(numbers made up for example):
-Core i3 65W: 50W, 2.3GHz
-Core i5 65W: 65W, 2.8GHz Turbo
Very demanding load
-Core i3 65W: 65W, 2.3GHz
-Core i5 65W: 65W, 2.3GHz
TDP is a worst case scenario over an reasonable average period of time. It's unlikely above TDP scenarios can be sustained. The particular reason Core M Broadwell(Skylake yet to be seen) was bad was that it finally deviated from that scenario.