To be more precise, the two companies merge, but you will not really see changes. The only difference is that when you purchase a license or another, your money will go into the same pockets.
The two teams will be met and the bracket will be the same for both programs.
The software currently in preparation, is Hold'em Manager 3 and Poker Tracker 5, will see the day as planned. So you'll still the choice between the two softwares in the future.
For more details on this merger, you can read the press release published on the website of Hold'em Manager for this purpose.
According to the release, this is a good news for all: "our customers are in a better position today thanks to the experience of our two teams. "[They will benefit] of our increased capacity to reinvest in innovation and the improvement of our products".
Discuss this news on PokerCollectif forums: Poker Tracker and Hold'em Manager merge