I'll be at SXSW, but probably not at the keynote. If there's a reasonable video feed, there's no reason to line up at 6am (after watching bands play til 2am the night before and writing about them til 5am) to cram like sardines into a conference room watch him read prepared remarks at a podium.
The more interesting thing is that the rumored tour routing at this point has a window between Vegas and Orlando that leaves room for the band the gather and potentially perform in Austin the 14th or 15th. I think a Springsteen ACL taping would fit in there very nicely. I'd line up for that.