It is here guys, at least according to HP datasheet.

AMD Ryzen 5 2500U with Vega Mobile

The Envy x360 15-bq101na is officially the first notebook with Zen APU. According to the datasheet, the device will feature Ryzen 5 APU called 2500U with 2 GHz base frequency and 3.6 GHz Turbo frequency.

Envy x360 is equipped with one stick of 8GB DDR4-2400 RAM, 256 GB of NVMe SSD and full HD touch-enabled display.

The graphics chip is integrated into the APU. HP confirms that Ryzen 5 2500U features Vega Mobile, possibly Vega 8 or 10.

The power consumption of the full system should not exceed 45W.

According to HP, Raven Ridge APUs will support up to 16GB of RAM:

Source: HP