With this product, and the upcoming eReader SDK (implied by comments from Foxit and Astak), MobiPocket's "DRM exclusivity" deals with dedicated reading device vendors will come under pressure for the first time. These were largely theoretical up until now, because there were no alternatives. Now there is at least one and possibly two.
Assuming the exclusivity requirement remains in place, the "future devices" mentioned here will not have MobiPocket support. Devices with 9.7" (and larger) screens will need good PDF support and are perfect for textbooks delivered as Adobe Secure PDFs (possibly with a time limit on use), so I would expect large screen devices to favor Adobe over MobiPocket.
Note that Robertb mentioned here
that Adobe wants $75K per year for the SDK.