Thanks to fuzztub07 we have some more info on what's inside the new Chromecast. Here's a link to the post with the image link so you can give him some thanks if you want:

https://www.reddit.com/r/googlehome/comments/iyxo56/pics_of_the_new_chromecast_w_google_tv/g6lxs1m/

The pictures he took are from running AIDA64. There's always a possibility it could read something incorrectly but it's usually pretty good. The one thing I'm not sure of is the storage. This says 4154MB total. A previous settings picture showed 4.4GB. We were assuming that was free storage out of 8GB. Now that is ambiguous.

So some things in the pics:

2GB RAM

4154 MB storage

4 core ARM Cortex-A55 1908MHz

64 bit ARMv8-A (32-bit mode)

You can look at the pics for more.

Already known from his previous posts:

Android TV 10

4.4GB storage (either free storage, possibly out of 8GB, or total)

USB-C power adapter

2 AAA battery remote

No IR on remote

Volume controls on remote control TV volume via CEC

Stadia app not currently available from Play Store

No built-in ethernet (he has not tried a USB-C adapter or hub)

4K and HDR support

You can get more info in the thread in which the link above is contained.

Edit: Here is another thread from the same user with a lot of information as well - https://www.reddit.com/r/googlehome/comments/iz50fb/scrolling_through_the_chromecast_ui_for_those/

Also, it was $50 at Walmart.