Espressif dveloped the ESP32 and NodeMCU users wait for this more performance offering CPU. The information is rare, yet.
In the NodeMCU repository on Github I found some discussion about the state of development and this nice diagram revealing some internals and peripherals.
It would be nice to hold this device programmed with NodeMCU firmware in hands asap. If you have further information please add it to get a better picture of what we can expect.
I received an interesting link from DIY India Magazine with some more information.