Haven't both sides always done this? Next gen starts when we say, this is how you trade games, we believe in generations?
We will see soon enough when we get proper comparisons and hands on impressions.
I haven't really seen Sony much acknowledge MS at all either directly or indirectly like this tweet does.
in the distant past? Sure
MS just seems a lot more vocal lately in calling out Sony even when some of these things are completely non-issues