Note that the JGP Whitepaper doesn't really say anything useful outside of what anyone who has done anything with MIDP already knew/suspected. It would be more useful to know how much of this is blocks and how much of this is just take it or leave it profile.
The average J2ME application (and this looks like CVM J2ME country to me) has a configuration, a profile, and optional APIs. I myself am already headed down this road for 'other things' and it looks like Sun is being taken down that path based on the immense popularity of MIDP development with Java and the strength of the industry pushing for doing 3D on cell phones and small devices (which immediately throws Java3D out the door).
Don't know if the Sun folks can/will respond, but I think that the API we will eventually see will be a lot closer to MIDP2.0 than it will be to Java3D. And if it doesn't - shame on them for missing the boat again