It looks like a GRD with a zoom lens. Actually, a very interesting zoom lens, starting at 24mm equivalent.
I used to have a GRD, it was very good ergonomically, but the RAW writing time was annoying. I could live with it when shooting off a tripod and doing IR, or landscapes, but for "normal" shooting, it wouldn't do.
I hope Ricoh has improved that aspect with this really interesting camera. I am also very curious about what the new GRD will look like; perhaps this GX100 is a show case for some of the innovations that will be implemented.
All in all, it is nice to see that Ricoh are still commited to build these interesting cameras. It would be nice to see other companies do the same; Sigma will release the DP1.
How about Leica releasing a digital version of the CM, or Fuji releasing a digital version of their Klasse W or S?