That sequel has shown up at the FCC in the US. It’s very similar to the past P-series models, with updated chipsets (including a major graphics chipset update) and CPUs.
The users manual is included at the FCC site.
Both Windows XP Tablet PC and Vista are mentioned in the manual, and there are two CPU choices, both still Ultra Low Voltage (ULV).
Specifications from the FCC Test model and manual: