Rumour has it that the Pixel 4a (5G) will have the same screen as the Pixel 4a. Google is apparently swapping out the Snapdragon 730 for a Snapdragon 765G though, which will include a 5G modem. The Pixel 4a (5G) will start at US$499 and is expected to launch in October.
https://www.notebookcheck.net/Google-Pixel-4a-5G-leak-suggests-5-81-inch-display-and-Snapdragon-765G-SoC-for-US-499-handset.486104.0.html
Add waterproofing, and it will be worth the price increase.