Fortunately, that's wrong. Nokia will be making their Nokia Drive app available to all partners (which includes HTC), but it is at HTC's discretion when and how they make it available. HTC does have their own navigation app, although I hear it isn't really good (no personal experience though, so I couldn't say if that's true). Nokia phones will have something called "Nokia Drive +" with their own exclusive features.
Originally Posted by Agpe17
I actually thought I read somewhere that Microsoft REMOVED the built-in voice navigation that required you to tap on each direction before it was read (I've seen that in person on an HD7, and it looks painfully annoying. How can you be hands free?). I disagree with their decision to remove since it actually reads street names where Nokia Drive doesn't, and having options is a good thing, but I digress. Aside from Nokia Drive (coming later), WP8 should still have navigation services built in, but without voice if what I read is correct.
WP8 will still be able to read your texts to you like in WP7. You'll also [still] be able to compose texts by voice, and they added the ability to add multiple sentences via voice (don't remember how this is done). Their closest Siri-like feature would be TellMe, where you issue commands to the phone (i.e. Search business name, Call so and so, etc), and app developers can incorporate text commands into their apps as well, and you can open apps with your voice, too.