The all new small motor based on the PFsmall motor, but with encoder and MINDSTORMS connector.
The new battery pack as you can see has different clips on the side (2) so you can not use the old battery pack but it uses the same 10v DC power adapter. the pack is again one module higher, but on the sides you can still add a cross beam.
LEGO Education MINDSTORMS site and their news site
below meet the designer!