If you're thinking about purchasing the new iPad Pro, Apple will also list Microsoft Office 365 as a worthy accessory to add to your order when checking out. It's an interesting move since it's a Microsoft product, direct competitor to Apple's own iWork, and the 9.7-inch iPad Pro can take full advantage of basic Office for free.
As The Verge spotted, the subscription to Office 365 is the only non-Apple product or service listed while checking out. The Office subscription itself includes not only more advanced mobile versions of Word, Excel, PowerPoint, and OneNote, but also available license for Mac too. The option appears for the iPad Air 2, iPad mini 2, or iPad mini 4.
That said, Apple is attempting to steer people away from the Surface line of tablets, and thus the company will need to offer Office to those who are more accustomed to Microsoft's productivity suite.