But the Touch Bar feels like a bolt-on "innovation", i.e. something Apple did to prove that they are still innovating and driving sales, rather than refinements

But the Touch Bar feels like a bolt-on "innovation", i.e. something Apple did to prove that they are still innovating and driving sales, rather than refinements to the MBP experience (the "P" in MBP) and more power. My point is that Apple knows that laptops are a declining market. Still, the professionals who use MBPs drive adoption of other Apple products.