When a single board computer has 4GB of RAM, you can use it as a capable IoT gateway or desktop computing. In addition to that, the Raspberry Pi 4 Model B maintains the same dimensions as its credit card sized predecessor, the Pi 3B+.
Although there are several single board computers which provided 4GB of ram, they are priced more than the US$55 price tag. Given that, the Raspberry Pi 4 Model 4 with 4GB of ram is a very attractive offering.
In case you are wondering whether you should buy the Raspberry Pi 4 Model B, read on for more perspectives.