Not fluff once you get beyond the intro.  The very first thing after that is "Rapidly deliver Java SE 7 with many new features" and there are lots of hard specifics about all sorts of things.  While I haven't read it it all yet (only overviews) it looks good.<p>In the area I'm watching, they have for JVMs "Run natively on Hypervisors" and for Sun Ops Center "'Bare Metal' OS and Hypervisor Provisioning".<p>Worth a look if you care about the future of Java (bleah) or languages that run on top of JVM (yeah!).