Better noise performance is huge if it comes to pass. Higher iso means faster shutter speed. If it comes out anything near what the Canon or Nikon camp has shown in it's latest offerings Pentax can do fairly well for sports. Albeit a bit more challenging but it may be able to pull off some very nice moments in sports. More FPS would be nice though.
When it comes to surfing shots the best I have seen is taken by Mark Dimalanta. He shoots Pentax istD, K100D, and K10D. His lens collection is the envy of anyone that has acute LBA.
Pentax can do surfing very, very well and also beach volleyball.