Apple has used the festival in the past to showcase a new product (like the iPad 2) or to promote its services (like the iTunes Music Festival last year). SXSW Interactive is the perfect audience of early adopters for a product like the Apple Watch and it wouldn’t be surprising if the company offered a preview of the device there.
SXSW is an annual Music/Film/Interactive conference that runs March 13th-22nd this year, the week following the March 9th event and before the Apple Watch goes on sale in April. One SXSW event Apple Watch enthusiasts may want to check out: Wearables and the Happiness Quotient.
A possible counter-argument to an Apple Watch presence that Apple has focused on Fashion audiences and not Tech audiences for the Apple Watch launch.