The correct solution is an anti-trust investigation into Amazon. Not carrying or supporting competitors TV boxes is a clear restraint of trade when Amazon Prime gives you a near monopoly on e-commerce for a huge block of customers.
If MS was abusing it's market dominance then, so is Amazon now.
With the IE case, you start off in a position where you already have a browser and you have to perform an extra step to get a different one.
This ignores the most salient part of the whole scenario.
Amazon is big, but still is only about 36-40% of the e-commerice market share, and far far less of the over all retail Market Share which is still dominated by Wal-Mart