While I am highly sceptical about the reuse of art assets there is a huge amount of material in there 20,000+ objects that will be very useful for testing and creating demonstrations. They could also form the base of some interesting derivatives modifying a 3D character and cutting out on some or all of the modelling, UV unwrapping and character animation for example.
I haven't seen the core software but there is almost certainly a solid 3D engine, shard based network communications system, RPG level AI facilities, combat model, audio engine, not to mention an entire free MMORPG platform if you want to pick it up tweak and run or simply just run.
Now that the fun part is over
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