"Fiscal year" is accounting term which companies use to delimit their financial accounting. For various, mostly boring reasons many companies do not use a fiscal year that follows the (Gregorian) calendar year, that is January 1st to December 31st.
My employer uses one that runs from April 1st year N to March 31st year n + 1. So for us, the current fiscal year is 2015-16, running from 1st April 2015, to 31 March 2016.
I suspect that the Nvidia uses the shorthand of listing only the year when the fiscal year ends (e.g. 2016 for my previously mentioned 1st April 2015, to 31 March 2016) .
That said, yes there is some needless confusion arising from omitting the distinction of fiscal year from calendar year in a non-finance publication like Tom's.