The long and short of it is that when the project is set up, the scope is to keep the spec as-is. So... if you're already adopting 1.0.1, things should work into the conceivable future.
If you're a vendor, this means that you can implement 1.0.1 with a pretty good measure of trust that your investment is going to last for a long haul. And if you're in an organization looking to make use of tools that use the Experience API, you can purchase with some certainty that a product using 1.0 is going to still be useful for years to come.
Feel free to ask questions and make comments below.