Looks like the screen is the same as the 3000 and confirmed to have the same resolution (320x240). Also looks like the screen is fixed and can't be positioned like the Tyros.

Dimensions of the S900 as follows:

100.2cm (W)
43.2cm (D)
14.4cm (H)

compared to the 3000:

97.3cm (W)
39.9cm (D)
16.7cm (H)

no word on the weight of the S900 yet.