So basically a PC with GPIO?
NVIDIA Jetson is the closest you can get in terms of performance, but the price is closer to $500.
DX2 specs:
GPU: NVIDIA Pascal™, 256 CUDA cores (1302MHz)
CPU: HMP Dual Denver 2/2 MB L2 + Quad ARM® A57/2 MB L2 (1.4Ghz/2Ghz)
Video: 4K x 2K 60 Hz Encode (HEVC) and 4K x 2K 60 Hz Decode (12-Bit Support)
Memory: 8 GB 128 bit LPDDR4 (59.7 GB/s)
Display: 2x DSI, 2x DP 1.2 / HDMI 2.0 / eDP 1.4
CSI: Up to 6 Cameras (2 Lane) CSI2 D-PHY 1.2 (2.5 Gbps/Lane)
PCIE: Gen 2 | 1x4 + 1x1 OR 2x1 + 1x2
Data Storage: 32 GB eMMC, SDIO, SATA
Other: CAN, UART, SPI, I2C, I2S, GPIOs