I want to know the answer to the following question:
What changes did Microsoft make to its certification requirements in March 2013?
All the background I'm provided with is that "In March 2013, Microsoft also amended its certification requirements to allow tablets to use the 1024×768 resolution as a minimum; this change is expected to allow the production of certified Windows 8 tablets in smaller form factors—a market which is currently dominated by Android-based tablets.". Is that enough to answer the question?