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https://en.wikipedia.org/wiki/Raspberry_Pi https://www.raspberrypi.org/products/raspberry-pi-4-model-b/ https://www.raspberrypi.org/products/raspberry-pi-4-model-b/specifications/ https://www.tomshardware.com/reviews/raspberry-pi-4-b,6193.html https://www.anandtech.com/show/14581/raspberry-pi-4-launched-quad-cortex-a72-project-board-for-35-dollars https://www.raspberrypi.org/magpi-issues/MagPi83.pdf Major improvements across the "board". The quad-core Cortex-A72 with other improvements is anywhere from 25% to 300% faster than the A53 used in the Raspberry Pi 3 . No eMMC but an SSD could be used with one of the two new USB 3 ports (booting from USB or Ethernet not supported at launch, should be ready within weeks). There are three RAM options: 1 GB ($35), 2 GB ($45), 4 GB ($55). The RAM is now LPDDR4 instead of LPDDR2. The 2 GB option is a bit unnecessary IMO and seems to be the least popular, as it's the model least likely to be sold out online (as far as I can tell). Ethernet speed can actually hit close to 1 Gbps (943 Mbps), up from 237 Mbps. There is Bluetooth 5.0 support but I haven't seen any testing related to that (I would love to use it for longer range audio transmission to BT 5.0 headphones). RasPi 3 cases are incompatible due to some port shuffling. There are now two micro-HDMI ports instead of one full size HDMI, so you probably need a new cable. The device can output to two 4K displays at 30 FPS, or one 4K display at 60 FPS (presumably two 1080p displays @ 60+ FPS, and so on). Although the new GPU has 4K@60Hz H.265 decode support, actually streaming 4K and even lower resolutions on Raspbian had issues in testing, that will hopefully be resolved with updates soon. LibreELEC developers have been working with the Pi Foundation for months to support the Pi 4, and have an alpha version out. Power draw and heat are up. You'll probably want a FLIRC case or something that can provide cooling. Power is now provided using a USB Type-C cable. Due to a screw up by the Raspberry Pi Foundation, some USB-C cables don't work. But the ones that do work should be the cheapest. Can it run TDM? The CPU and GPU are much better and the potentially quadrupled RAM could be a big help. The 4 GB version can be a legitimate desktop replacement for many users, albeit with some quirks.