I'll be getting one ASAP.
Wolfson is nice, but implementation probably won't be ideal like in the S3 (output impedance slightly too high for high sensitivity IEMs at ~3ohm, and likely quite high stereo crosstalk), best thing for me about audio is that it *should* support USB audio like the S3.
I should be getting an invite to the launch party a few weeks prior to release here, so will get a chance to put it through it's paces a little ahead of retail release all things going well.