While these new metrics might make more sense than measuring clickthroughs, I still don't see how this will achieve the objective. Time spent on a page or how deeply I scroll down an article is no indication of how likely that corporation is to separate me from some of my money.
I think TV has been advancing toward this point for a long time, but the Internet is overtaking it quickly -
The core problem is that there's just way too much low quality content out there. There's an avalanche of TV channels, websites, blogs, zines, etc - a mountain of content for every eyeball walking the earth and more. But 99.99% of the content is nothing that anyone would actually pay money for.
Clickthroughs allowed temporarily the parasitic existence of clickbait sites and fake news sites ad infinitum.
But we are getting to the point where people realize that there are about 5 TV channels they ever really want to watch, and about 5 websites they would care if they had to live without, and even fewer that they want to pay for.
The problem is not the metrics. You're going to get what you measure.
The problem is really that nobody is making anything that the general public thinks is worth paying for.