Prior to Yosemite and iOS 8, SMS/MMS text messages were a second class citizen on your Mac. The Messages application only displayed iMessages, not SMS/MMS messages. A new day is dawning. From Apple’s web site:

With OS X Yosemite and an iPhone running iOS 8, you can send and receive SMS and MMS text messages right from your Mac. So when friends text you — regardless of what phone they have — you can respond from whichever device is closest. All the messages that appear on your iPhone now appear on your Mac, too. You can also initiate a text message conversation on your Mac by clicking a phone number in Safari, Contacts, or Calendar.

I use Messages all the time, partly because I spend more time on my Mac than on my phone or iPad, but mostly because I can type a lot faster on my Mac. Most of the folks I interact with work with iMessages, but when I run into someone who doesn’t my workflow grinds to a halt. I have to pull my phone out of my pocket, type a response, perhaps wait for their response, all while switching between my phone and Mac.

To me, this is another home run feature.