Hmm, they will be re-engining the A320 and 737 airframes in the 2016-2020 period as someone already said. The new A320 will feature winglets which is great!
The model in the link above seems to just have winglets, I don't think it is the A320 replacement, just another upgrade to keep customers happy.
Future narrow body replacement projects for Airbus and Boeing are being held back because of big projects - A380, A350, 787, 747-8.
China and Russia are entering the new narrowbody market with the SSJ, MS21 and COMEC 919, the latter two choosing Western engines. Can't forget the CSeries either!
They are probably the newest generation narrowbodies until Airbus or Boeing do something, the market has been neglected.
On a side note it would be great to see winglets added as a buying option for some aircraft in-game, or even as retro fit kits for 2nd hand a/c.