From the link in the OP:
The new reserves in those countries pushed up the worldwide total of shale oil that can be recovered using existing technology to 419 billion barrels, a 13 percent rise over the EIA’s previous estimate, or about 48 billion barrels.
And from the IEA:
For 2016, the IEA Oil Market Report forecasts worldwide average demand of nearly 96 million barrels of oil and liquid fuels per day – that works out to more than 35 billion barrels a year.
So to put this news into perspective, it's an increase of about a year and 5 months at 2016 forecasted consumption levels.
Good news, but not revolutionary.