The Surface Pro 4 is thinner, lighter and yet more powerful than the Pro 3. It's powered by the new 6th gen. Intel Skylake processors and they can pack up to 16GB RAM and 1TB SSD storage.
The Surface Pro 4 will with either the Intel m3, i5 or i7 processors.
There are also the different memory options, 4GB, 8GB or 16GB RAM combined with different storage options: 128GB, 256GB, 512GB or 1TB.
You can check out the Microsoft Surface Pro 4 page for more info on the device.
The Pro 4 will be available from Oct. 26th with starting price at $899