As I understand it if the LAPL does replace the NPPL then anyone who can't get a class 2 medical won't be able to fly!
I would guess that this includes the vast majority of NPPL holders (including myself) who took an NPPL licence precisely because they were unable to get a class 2 medical.
We have until tomorrow to comment on this point to EASA apparently.
See the LAA site for more details.