outright admitting that they arent working on new hardware is a bad sign. it takes years to develop a console, and the PS5 and next Xbox could very well launch next year. if that happens, game devs arent going to care about the bottom line, the Switch is going to be left in the dust.
Outright admitting they would be working on new hardware would be bad, as then everybody would wait for the new hardware and not buy the current one anymore. Especially since Nintendo consoles are known for several revisions, and thus a successor might have been misinterpreted as a Switch upgrade to come out soon.
Both Microsoft and Sony admitted, but also basically said not before 2020. So at the time they did, that was still 3 years in the future, with the One X not even being released yet. That would have been too long of a wait and thus didn't impact sales
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/