Well it doesn't have gigabit ethernet, so that won't help. The 802.11ac wifi might be faster than the 100BT ethernet I am currently using. And the device might perform a little faster because of the new processor.
Even if it does, I can't imagine that these incremental improvements would justify me spending $300 to replace my two AppleTVs when I just don't care about new features like the app store or games. I also really dislike Siri so that's not a selling point, and I'm happy with the old style remote.
I'm sure the new AppleTV will be a nice upgrade for many people. Just not me.