Well this exterior certainly isn't giving much away, but you can't always judge a book by the aluminum-and-glass shell of the iMac that you're reading it on. Let's start with what we know:

3.0 GHz quad-core Intel Core i5 (Turbo Boost up to 3.5 GHz)

8 GB of 2400 MHz DDR4 memory

Radeon Pro 555 GPU with 2 GB of VRAM

1 TB (5400-rpm) hard drive

802.11ac Wi-Fi and Bluetooth 4.2

43% brighter display (500 nits) with 4096 × 2304 resolution and P3 wide color gamut