The rumored resolution for Quest 3 appears to have been confirmed by a listing on Best Buy. - UploadVR
Quest 3 Rumored Resolution Seemingly Confirmed By Best Buy Listing
The Best Buy listing for Quest 3 suggests that the headset will have "a nearly 30% leap in resolution from Quest 2", which may confirm the previously rumored 2064×2208 resolution per eye. The exact display type and refresh rate are not yet confirmed, but it's possible that the rumored 120Hz refresh rate is accurate as well. Full details of Quest 3 will be officially announced at Connect 2023 on September 27. Visit the source at UploadVR for the full story and a comparison chart of Quest 2, Quest Pro, and Quest 3.
Source: https://www.uploadvr.com/quest-3-resolution-confirmed-best-buy/