I don't know why the MBP and iMac are on that list, there's been a new MBP and the iMac couldn't really have been updated significantly until recently... they didn't choose not to do it, the upgraded components weren't released. And the iMac update this year will be worth the wait.
It hasn't been 4 years since the announcement let alone the release of the trash can Mac Pro, but regardless that information is not correct. They didn't just put the Mac Pro aside to deal with later, they have been figuring out what to do and testing different designs for over 18 months.
With regards to finalising the plan of the modular Mac Pro that happened in recent months (meaning the second half of 2016), with development on that model happening more recently.
As said in the report, Apple have doubled down on Pro users since the early MBP backlash, so the finalisation was relatively recent but it wasn't last week.