Curious how the new Mindstorms EV3 will compare with the still awesome NXT? Laurens Valk compares the two systems in a very thorough blog post.
The EV3 brick features a more powerful processor, 4 motor ports (instead of 3), a micro SD card slot, a USB host port and a Linux operating system. In addition, it has a slightly larger screen, more buttons, and it is possible to control the EV3 brick using both iOS and Android devices, as opposed to Android only for the NXT. (…)
Although the general user will not notice on the outside, the brick runs a Linux based operating system. Basically, this means that your robot almost resembles a full computer, a bit like the Raspberry Pi! This means that you can add other devices to the USB port on the brick, such as a WiFi dongle for wireless connectivity, a USB keyboard for extra input, or a USB webcam for object detection.