Preorders for the Surface Book and Surface Pro 4 began earlier this month and now both devices are available. Microsoft is selling the Surface Pro 4 through its website, Best Buy, Amazon, and Target. The Surface Book is a bit harder to find since it is only listed on Microsoft's site right now.

Compared to its predecessor, the Surface Pro 4 has a larger screen, superior resolution, better keyboard, and slimmer design.

The Surface Book is a laptop/tablet hybrid that comes with a 13.5-inch 3000 x 2000 display, up to 16 GB of RAM, and up to 1 TB of storage.