Well the latter of these two accessories, the WCH10 Wireless Charger (FCC ID: PY7-AC0010) has just passed through the FCC. The FCC documents confirm that Sony is using the Qi inductive power standard and in some of the tests it used a Nokia 920 to see how well it worked.
The device is listed as having an input of 12V ~1A, but no further information could be gleaned from the documents. The charger and wireless Xperia Z2 cover are rumoured to launch in June 2014.