SPOILERS! If ya aint watched it yet then dont read on!
Just watched Asylum of the Daleks.
Moffat has said that this season is going to be single story "blockbusters". Judgeing by Asylum, it looks like he is right. Smiths previous season seen budget cuts by the BBC and the rumor is this season's budget was increased to bring it inline to what Tennant's final season was. Lots of Daleks around including the classic series Dalek and even a Special Weapon's Dalek from Remembrance of the Daleks during McCoy's run in the 80's.
The interesting plot point for me though was the final 5 minutes. The Dalek's being made to "forget" the Doctor.
This single plot point has closed off one of the major problems Moffat would have in bringing back Gallifrey either at the end of this season or the end of the 50th anniversary season which will kick off in Autumn of 2013.
The biggest problem with the Timelords returning was always with The Daleks. The minute the Timelords came back, the Daleks would no doubt attack and start off the war all over again.
Making the Daleks forget the Doctor not only wipes from the Daleks memory every single encounter the Doctor had with them, it may also technically wipe from the Daleks memory the actual Time War itself. Think about it...
Every single encounter the Daleks had with the Timelords in every single episode of the classic series was with The Doctor (barring the appearance of The Meddling Monk in his final showing during the Hartnell run). The Last Great Time War was led by the Doctor according to the sontaran guy during Poison Skys.
The Daleks have forgotten The Doctor...therefore if the Time Lords came back, the Daleks would technically have very little, if any knowledge of Gallifrey or the Timelords and wouldnt go on a full out assault of Gallifrey straight away.
This single episode has made it possible for Moffat to reintroduce Gallifrey again sometime in the future.