Espressif released the news about a new System in Package (SIP) ESP32 which supports WiFi and Bluetooth connection a few days ago..
The ultra-small board contains ESP32 in QFN package, crystal oscillator, filter capacitors and antenna. ESP32 includes 4MB FLASH memory.
Another info are not available now – like price and release date.
@eMbeddedHome twitter account shared a few pictures of ESP32-PICO-D4