Peter:
Whirlpool's Duet "Sport" is the cousin of Kenmore's HE2 series, so the features will probably be much the same as Duet washers.
No word on if the unit will have an onboard heater, or just elaborate ATC controls for water temps. Whirlpool claims the unit was designed with second story installations in mind, (in fact if one looks closely at the picture featured in the above link, you can see the window has a view out of an apartment window), so that will be interesting to see.
Whirlpool's new "Sport" units are the same height and width as Duet washers, but only a few inches shallower in depth. How that translates into "space saving" will also bear looking into.
Ciao
Launderess
W