The latter posted a series of images on Twitter featuring Surface Pro 7, 13-inch and 15-inch Surface Laptop 3 and a third Surface 2n1 device with ARM mobile processor.
The images are authentic and Blass has a good track record with such publications. He also closed his tweets with another product which was not specified with photos but which is a dual-screen Surface.
Microsoft is expected to present all of these devices at an event in New York on Wednesday. In the past it has been unusual for such a large-scale product to emerge as it did today with the Surface two days before its debut.
However, the information does not even compare to that of Pixel phones which are the most commented and detailed online devices for long before the official launch.