I;m not sure exactly what’s in this update, but my 1020 just alerted me of an available NOKIA software update. It only took about 3 minutes to install, but it’s currently “migrating data” so I’m not sure what’s new yet; unfortunately this probably isn’t the Nokia Black update that was announced alongside the 1520 & 1320, but who knows?
*P.S. my 1020 is UK region, running GDR3
After the update my software version is 3050.0000.133x.1001.
According to the Nokia support page the included features are: