Makes sense... maybe a bit twisted but I can see how it would make sense to the folks at MS. In the past they made money selling Office, & add-ons & such were something that could break Office & cost them money in fixes & support & lost sales. Now they're trying to move into the retail space, selling stuff that they didn't make themselves for a profit. Unlike the local drugstore or corner market, they don't have to 1st buy the goods on the shelves, but get them essentially free, so the more goods you have, the more potential sales, the more potential profits. In fact, the less work they put into Office, the more opportunities to improve it, the more add-ons to supply those improvements, the more commissions collected for selling those add-ons -- MS is getting paid more the less work they do, the less they include in Office itself!
The catch is, & I hope no one gets offended, Apple users are Apple users... people willing to pay more for their hardware & devices, people willing to get involved buying from Apple's store, have already bought Apple hardware -- Windows users have always had that choice & said: no thank you. Microsoft has to create a new market for this to work -- they may/may not be able to, but like every huge company nowadays, they're afraid of getting locked out of something by their rivals.