They look like new channels to me? Not that I'd make use of many of them. But Showcase is huge as it means Game of Thrones on a big TV, in surround sound (as oppose to putting up with inferior quality downloads prior to the BD's becoming available).
It's the same as mine. The bonuses are quite significant (31 channels I don't currently have access to, worth $26 per month under the new pricing, minus BoxSets), since I used to pay $20+ more for these channels last year before downgrading to Essential + Sports + HD, and Showcase was the one channel in the previous movie pack that I had actually wanted (for the HBO stuff).
The new $25 base pack removes quite a lot of channels, including SoHo and FX (moves to $20 Drama); Disney, Cartoon Networks and Nickelodeon (movies to $10 Kids), and Lifestyle You (moves to $10 Entertainment Plus), replacing some with other channels. The bonus offer attempts to gives you back all of these lost channels by giving you the entire add-on pack that these channels will now be part of (plus the new $10 Docos pack as well, for some).
So the sweet spot might be for those that do not have any of the General Entertainment packs ("Documentary & Adventure", "Drama & Lifestyle" and "Kids & Music"), as you may get up to 31 extra channels in your bonus offer. The offer becomes less and less generous the more General Entertainment packs you have (although Foxtel offers you BoxSets as compensation if you have one of these packs).