When did Jobs tell Intel this? We know for a fact:
1. The AIM Alliance (Apple, IBM, and Motorola) and especially the I part of that could not develop G5's for a laptop that wouldn't melt the ice caps due to power consumption and heat dissipation.
2. The G4 was just not strong enough anymore, already softly hit the limits of the chip, and then severely hit those limits around the time of the Mactel switch.
3. The reason for the big switch to Mactels was exactly about those items you mentioned above. Apple's mantra since the Intel switch was "faster, lighter, cooler."
4. Intel, and especially its Apple contract, stagnated to such a point that an iPad Pro was legitimately more powerful than an Intel MacBook or MacBook Air. Possibly/Probably even stronger than a 13 inch MacBook Pro. And all while not making enough heat to rival the planet Venus and using lower power consumption.
So when did Jobs specifically tell Intel, "You need to do more with X and YOU WILL SERIOUSLY REGRET IT IF YOU DO NOT DO MORE WITH X." That exact type of quote was said during the great debate over CodeWarrior vs XCode.