Raspberry Pi Foundation announces Raspberry Pi 4 with 8GB of RAM - TechCrunch

The foundation says that it has been working on an 8GB variant for a while, but it took longer than expected as an LPDDR4 RAM package with 8GB had to be specifically designed for the Raspberry Pi.

On the software front, the Raspberry Pi Foundation has started working on a 64-bit version of Raspbian, the operating system designed to run on a Raspberry Pi.

Raspbian still uses a 32-bit kernel and needs to make the switch to 64-bit to take advantage of the 8GB of RAM.