The Witness packshot image
The yet-completed version of the game allowed played to walk about the island from a first-person perspective. Throughout the island are blue panels that players can interact with; those seen in the demonstration were primarily mazes, requiring players to draw a line from a starting point to a finish point. Other panels showed more complex mazes to be completed. Completing each panel unlocked other areas to explore or panels to complete. Blow has stated that there is more to the game than these mazes, in response to concerns from players; to Blow, "the point is the magic that happens in the player's mind when he understands the subtle things that the mazes are saying - because the mazes aren't just puzzles, they are lines of communication that aggregate, become more complex and eventually say surprising things".
The Witness GPU Performance Comparison Graph

The Witness GPU Analysis
Comparing The Witness PC system requirements to all GPUs shows that The Witness is going to need a graphics card that is capable of DX 9 or OpenGL 4.3.

The Witness makes use of DX10.00 so a GPU with that capability could benefit from enhanced visuals.

To get the best visual graphical experience on The Witness, aim to have a GPU that has at least 3.072 GB GPU RAM.

Only top performance graphics cards currently available today, will probably allow you to play The Witness

We are advised that 7 year old graphics cards should be able to run The Witness , but there could be a few exceptions to this rule.

Note that most games do not officially support laptop graphics cards, but nowadays many laptop graphics solutions are capable of running modern games. Whether desktop graphics cards or laptop, try searching for your graphics card to compare against the The Witness graphics card requirements chart below.