There have been a ton of questionable touchpad technologies used since laptops came onto the scene. For quite some time, manufacturers were using touchpads from countless third party companies, each one of them generally lacking quality in one area or another. When Microsoft introduced Precision Touchpads, a lot of manufacturers jumped on board to adopt what seemed to be the best touchpad technology that was available at the time. Every once in a while, though, you still see some manufacturers not falling in line.
With future builds of Windows 10, some news from WinHEC suggests that Microsoft intends to make sure that everyone sticks with the Precision Touchpad standard that mostly everyone has already accepted. For those of you with old laptops, don't worry: this isn't going to change anything for you. All this is going to affect is the "Built for Windows 10" sticker that manufacturers are always looking to grab. Nothing is going to stop working with Windows 10 as a result of this.
All we know is that this is going to be happening "at a later date." We have no idea when, exactly, Microsoft plans to implement this policy. It's very likely that it could be going into effect with Redstone 3, though. At the end of the day, this doesn't have too much effect on the end user - again, your existing laptop should be able to upgrade to the next version of Windows 10 without any trouble. This policy should just make sure that manufacturers looking to ship with Windows 10 installed will have the best touchpads available.