Because we all think "what would my Doctor be like?" sometime.
One of the downsides of international travel is missing relevant routine stuff. By way of example, this week's Whitechapel Remake/Remodel closed ten hours before I thought to check it, and is relevant to my interests.
Imagined Thirteenth Doctors who look like Paterson Joseph, Bill Nighy, Tilda Swinton, Paul Bettany, Amanda Palmer... I would particularly point to Pia Guerra's entry due to the fully-developed new TARDIS console and the special guest appearance by Sally Sparrow.
I'll discuss the not-irrelevant Who panels at Worldcon at some point in the foreseeable future.