In an interview with SFX, Matt Smith said:
It’s about looking back and forward at the same time, a bit like the Doctor does…It’s about celebrating everyone that’s been involved with it, all the wonderful actors that have taken part before me, and it’s also about looking forward.
Matt also praised his predecessors:
I feel in a very privileged position, having had people like David and Chris, Tom [Baker], Patrick [Troughton], Jon [Pertwee], William Hartnell… great, great actors behind me.
Previously, Steven Moffat has underlined the importance of moving the Doctor’s story forward and not ‘all looking backwards’. Of course, it would be rude to not celebrate – but let’s not do it on their behalf… here’s hoping their invitation is in the mail (with an anniversary stamp of course!)