I was just wondering. Part of my "research" in determining which device to buy (I had pretty much narrowed it down to a Samsung device by that time) was finding out which tablet came out when. On searching, what I found was that the Tab 4 came out in April, the Pro came out in, I think May, and then the S came out in July. I know the speed with which they came out didn't have anything to do about if one flopped, or anything like that, but why did they release three devices (well, four if you count the 10.1 to be a different device from the 8.4) so close to each other - within four months of each other. I went ahead and got the 8.4 for a couple reasons, but I'm still wondering about why three devices so quickly right after each other? I'm really only seeing minor differences.