The announcement of the new 'budget' iMac I think illustrate's what Apple currently defines as the lower end of their target demographic. While inexpensive for a Mac desktop computer, it's certainly not inexpensive compared to other computers.
HealthKit and HomeKit are just frameworks, not new hardware products and it's new hardware products that Apple' needs (like the rumored iWatch or super improved TV).
Sales via the iTMS are a pretty small part of Apple's overall revenue. Apple is a hardware company so any software and services they offer are there to entice people to buy Apple hardware.
If the Health, Watch and Homekits became best of class (as iPod did in music players), that will add to profits. It will also help iPhone, iPad, Mac marketshare as if these new products sold very very well, there will be many non Apple users buying them, they will intentionally or otherwise migrate to Apple. More new sales, new App sales, etc.
HealthKit and HomeKit are just frameworks, not new hardware products and it's new hardware products that Apple' needs (like the rumored iWatch or super improved TV).
Adding new iPhone, iPad, Mac users is huge as these new sales will stay and provide ongoing sales in apps and iTunes content. Factor in a more useable Apple TV, and why would you buy various brands if you can get everything under one roof that are so heavily integrated
Sales via the iTMS are a pretty small part of Apple's overall revenue. Apple is a hardware company so any software and services they offer are there to entice people to buy Apple hardware.