I agree—no tool, including DevTools, simulates the on-screen keyboard and its impact on the viewport. Mobile View is still a tool—for a quick preview of the responsive design and presentation (to a client/employer), not a full emulator for final testing.
For a truly accurate test (keyboard, touch, performance), you still need a real phone—this is stated on the website and in the Chrome Web Store description. But as an idea for future implementation, it's excellent! Thanks for the feedback; you actually dug into it and thought about what was missing)
> dug into it and thought about what was missing
Got bitten by it. A fixed input at the top of the screen just disappeared. Needed an entry in the page meta to sort it.