The cabin upgrade to look like a -400 with the same J/Y seats and entertainment system.
The AP stays the same with a V Path displayed on the EHSI. Also get an EADI.
KLM has been operating a system close to this for years except they also changed the engine dials to glass on the front panel.
One -200 is staying till end of next year at this stage. The -300's look like another 5-7yrs. This time frame is all word of mouth.
Regards.