What indications of this are there?
Big chip has never served them better, high end gaming has never been healthier.
Plus they invented whole new prosumer market - all the benefits of DP with no driver or ECC support for midway price.
First, its just speculation based on the fact that they were completely "sush" about Maxwell on the keynote. Even on Fermi times, when things were not going well they showed something (wood screws event says hello).
Second, changes in company strategies are taken well in advance of their realisation and take into account the future and not only the current moment, so how well things are at the moment is not necessarily the major driving force.
Third, even if high end gaming is healthy, if nVIDIA sees more attractive perspectives elsewhere for their technology, which would demand a refocus of resources (even a company as big as nVIDIA has to make choices), they could make the change. They are a company after all, looking for profit.
Fourth, I am not talking about doom and gloom here (like Charlie probably did). I am talking about conscious business choices.
Lastly, you can "attack" me however you want, since I am just speculating with no access to info whatsoever
End note: I am far from being an nVIDIA hater as many of our members probably know
EDIT - Another point: nVIDIA is pushing GRID and cloud computing hard. I would say they (crazily I know) envision a future where gaming is cloud and not desktop based.