Everything we expect Google to announce at its biggest product launch event in history

Google is shaking up how it does smartphones.

Instead of a new Nexus phone, the company is said to rebrand its smartphone line this year as Pixel, the same name it gave its high-end Chromebook a few years ago.

According to Android Police, which covers Google news, Google will announce two new Pixel phones, the Pixel and the Pixel XL. The XL model will have a larger screen. Both phones are said to be built by HTC, but they won't feature any HTC branding. This is meant to be a pure Google phone, and it's a hint that Google intends to build its own hardware moving forward.

Of course, the Pixel will run the latest version of Android, called Nougat, and won't have any extra annoying software Android phone makers usually add to their devices. Google will likely sell the Pixel unlocked, too.

Google's newest Chromecast will support 4K video, according to Android Police.

The new version of the popular video streaming gadget should appeal to those with high-end TVs, but most people will be fine getting the normal HD Chromecast. Most video isn't streamed in 4K, and most TVs today don't support it.

Google announced its new Android virtual reality platform called Daydream earlier this year, and it looks like the first Daydream headset will be built by Google itself. According to Android Police, Google will call the device "Daydream View."

Daydream is an open-source design for VR headsets that lets you slot in an Android phone and enjoy VR content. It also comes with a wireless remote for controlling games and navigating menus.

However, it's still early days for Google's VR ambitions. Daydream will only work on certain high-end Android phones (you can bet the new Pixels will be included), and there likely won't be a ton of content to consume at first.

Google reportedly has a grand plan to merge Android with Chrome OS, the operating system that powers Chromebooks.

We may get a preview of that new operating system, supposedly called "Andromeda," at Google's event on October 4, according to Android Police.

This is the beginning of a huge shift for Google. It'll soon have one unified operating system running on all kinds of gadgets. However, Andromeda probably won't be ready until this time next year.

Google wants to make WiFi in the home better, and plans to announce a new router called Google WiFi, according to Android Police.

The Android Police report makes Google WiFi sound very similar to Eero, the tiny router system that lets you create a mesh network around your home. That means Google WiFi, like Eero, will let you place tiny routers throughout your home so your connection remains strong no matter where you are.

Finally, Google may announce a new 7-inch Android tablet, according to Evan Blass, a gadget leaker with a near-perfect track record.

Blass says the tablet will be built by Huawei and launch before the end of the year.