On the site Sacri Palazzi there is a splendid article by . It is in Italian. I will see if I can get it translated for you, because it is worth reading. However, these are not exactly empty days for me right now.
I must immediately share something at the very bottom of the piece:
The Motu Proprio Summorum Pontificum (within days there will come out – it’s already ready – a note from Ecclesia Dei which will better explain its implementation) is an important sign post on the route to this return to a common orientation. The little modifications brought into the pontifical ceremonies in these months are too. These, in fact, are faithful to the rules and therefore to a liturgical criterion that comes down to us directly from the 2000 year history of the Church.