Quoted from Whysnow:
I personally think they should still reveal the game even if they are not bringing it. Lots of potential customers that wanted to know what was coming...
I'm with you, TPF is the show to announce the new game and talk about what's new and different compared to the original even if the game itself is not ready yet. It's a missed opportunity to get a large amount of pinheads excited about what's in the pipeline.
Regardless, I plan on having a blast at TPF but at they same time was looking forward to the reveal