Only if you draw the finish line at your own two feet. Five thousand years from now, no one will look back on 2020, and say there was no need to innovate any further because technology was "very mature" at that point. If you can't think of anything between what an iOS device does today and teleportation, I can see why you went to the "The Tech has Matured" defense. ...which, in every industry, especially tech, might as well be shorthand for "I'm out of ideas", & is a very risky position to take.The tech isn’t new anymore. It’s very mature.
The iPad... a $1500 cellular & GPS enabled iPad Pro can't even handle being the base device for the Apple Watch. The iPad mini, the most portable, useful and for the longest time popular iPad, hasn't seen a meaningful upgrade since 2015, and just today they updated the base model iPad to its chipset. The progress being made is slow as molasses here. The watch team has been busy on the 6 and that's great, but the business end of the watch is still a klugey mess and the only other thing Apple had to show off this year are a budget iPad & budget Watch, as if there weren't already a glut of old cheaper models of both to get into. That entire iOS line is headed into in the same logjam the notebook line was in for years...
Compared to the duo of an iPad and Watch, the iPhone is an unnecessary redundancy, sitting in a dock costing a hundred dollars a month while serving no real purpose. It has neither the real estate, power & stylus of the iPad, nor the mobility & sensors of the watch. Apple is putting off the inevitable bifurcation as long as possible, milking the profitability of the phone's waning popularity, but it hamstrings the other two, and effectively makes all three products worse.