I had tried the "Read aloud" feature on my desktop and laptop machines in the past and had always been disappointed with the choppy, poorly cadenced result. I happened to try it on my new Windows 8 laptop this week and was very pleased. It is really close to someone actually reading the text. I verified that I was still getting the poor quality on my Windows 7 laptop, but I found the good result with several resources on my Windows 8 desktop.
It is good enough that I will add Bluetooth to my laptop in order to use my headphones.
So if you had given up on "Read aloud" in the past it is now time to try it out on your Windows 8 platforms. Perhaps someone can post a report on the state of this feature on the Mac.