One of the reasons I purchased a Macbook rather than a Windows laptop was that the macbook integrates so seamlessly with the rest of my Apple products, so my Apple Desktop,Macbook, iPad, iPhone, AppleTV and Time Capsule just slot together so easily, and so well.
The ability to share the time capsule with both Desktop & laptop for backups, without the fiddling around needed on a PC, the way a calendar entry on any device is automatically transferred to all other devices. My kids all have iPhones, so iMessage gets a hammering, so being able to message from my laptop/desktop is a real bonus, and from IOS8/Yosemite the ability to make/receive phone calls from laptop/desktop, and send/receive SMS messages from non iPhone users on phone/ipad/laptop.
I know you can probably achieve most of this with PC/windows/android phones, but it takes a fair degree of setting up/adjusting settings etc.
So if you are considering the Apple line up of products, then a Macbook would seem a sensible purchase, and get the best you can afford.