Is Yahoo's recent innovation result of Microsoft threat or change in leadership?

For the last few months (seems like ever since Microsoft began to seriously make noies) the innovation has started. Is this a result of i) the threat of an acquisition attempt or ii) fruits of the change in leadership i.e. the move from publisher to real tech company?

A lot of the products are very early stage and would appear not to be quite the finished article while also quite obvious and "cool" without much practical application.

I lean towards the former forcing the pace of the latter.