I have recently contacted SAAB about Gripen NG and changes it will have when compared to earlier versions of Gripen (A, B, C, D - Gripen NG encompasses versions E and F).
I got following answers:
1) Gripen NG will be equipped with imaging IRST (imaging IRST works similar to IR camera and can create video image from IR radiation it receives). It will be forward-looking only (FLIR).
2) Airframe will be increased in size, and wingspan will also increase. Wing area will increase, so wing loading, while slightly higher than for C/D models, will still be low.
3) Cockpit will not be changed; rearward visibility will be facilitated by mirrors.