They will talk about the increased power, but I don't think there will be a lot of hoopla about it. I don't even know if they'll give specific numbers (hope they do). I don't expect them to show a Neo demonstration reel (e.g., Neo vs. PS4), but I guess we'll see.
I think if the specs are what have leaked, they will talk about more power in general terms but not raw numbers.
It will be similar to the part of the Xbox One reveal where MS talked around the numbers and just used words like speed and power. They may state percentage of multiple increases at the very best.
They know they will be 'Top Trumped' by the competition so will probably keep the specific numbers out of sight.