It's a strategic departure from being a consumer luxury product company, and the shift to enterprise suggests they're out of ideas, but at the rate they're losing consumer growth I'd say they've still got another 150 years. Leveraging the apple store as a service point is a huge deal, as it may compensate for the additional hardware premium their products cost.
I've worked in a large number of organizations as a consultant and the microsoft ecosystem is basically unusuable to me now. Between performance issues and thoughtless design, I switch back to my apple devices to do simple things and get real feedback from actions while I'm waiting for the microsoft platform to respond. As a result, I manage client work on MSFT, and do real work on my mac. With Apple getting into this space, I can't see buying another microsoft product unless I actually hated the people I was hiring to use it.
The essence of the apple experience is that by their products being designed to be responsive no matter what, you are always engaged and working on them for the feedback, whereas some MSFT error message means I'm going to go do something else for 15-20m while I get past the gumption trap. Current one is having to reboot the machine to reset a VPN driver just to check client site email. MSFTs problem isn't from lack of a solution, it's that the problem exists at all and as a user I am even aware of it.
I have lots of issues with Apple's social decisions, and am switching out of their ecosystem because of it so I'm not an uncritical fan, however, this announcement means they aren't just getting into enterprise, they're getting upstream of it and in 10-20 years they will have replaced a lot of it. They're dropping in on a macro trend wave that is how work itself is going to be different.