This will completely change the fabric of the UK charts, and the way music is released.
The good news is songs may be released in the UK earlier.
It's not really good news, as that strategy is the reason why UK singles sales are relatively high. Now singles sales will decline even further than they already have
I don't even think this will change things that much Songs will still enter with high debuts, it just means that songs will stick around for longer because they are continuing their popularity. It's a better and more accurate way of determining song popularity imo.