They did say that they will start to show the M8 and The 8 Gran Coupe privately towards the end of the year. This may probably include the XMs.
Dear Scott27,
I hope you are doing fine. So it seems your above statement has been effective last Saturday as it has been mentionned that the X3M and X4M, along to X7 and M8 were presented privately in Sweden this weekend.
Have a nice day
Sank