For SEO for Google searches, the shop announcement should include the keywords from the shop title and section names. The new shop pages do not include the shop announcement. Google and the other search engines still do see the shop title and section names but not the shop announcement.
Etsy has copied the first few words of the shop announcement along with "by shopname", into the description meta tag that is visible to Google and other search engines. The description meta tag is visible in Google search results. The description meta tag on my main Etsy shop page looks like this:
"An Etsy shop with professional SEO will always do by SEOWebDesign"
When the old shop pages with banners and shop announcement come back, it would be a very good idea, for anyone who cares about Google SEO, to add the main shop keywords to the first few words of the shop announcement. This way, no matter what happens with the design, shoppers searching for items like yours will see what you are selling in Google search results.
That is what it looks like right now - just the first few words from the shop announcement text copied into the description tag. Using at least the primary keyword phrase (such as "Handmade Beaded Jewelry" or "Knitted Baby Hats" etc) at the beginning of the shop announcement will ensure that this important piece of information is visible to the search engines such as Google.
The tags, such as title tag, keyword tag, and description tag, along with a lot of other tags that having nothing to do with SEO but are important to the search engines, are not visible on the Web page. The tags are part of the program code for every Web page.
The program code for any Web page can be seen by right clicking on a blank area of the Web page and selecting "View Source" or "View Source Code" from the drop down list. A new browser window will open up and display all the program code for the Web page you are looking at. Around line 20 from the top, you will see a few lines of code that look like this:
<title>SEO Web Design SEO Success Guide Books & by SEOWebDesign on Etsy</title>
<meta name="keywords" content="custom web design,web design templates,etsy shop seo guidebook,etsy shop banners" >
<meta name="description" content="An Etsy shop with professional SEO will always do by SEOWebDesign" >
Go to the main shop page of your Etsy shop and right click to view the code for your shop. Look for the Title tag, Keyword Tag and Description Tag starting at around line 20. You will see the shop title in the title tag, the section names in the keyword tag and the first 70 or so characters in the description tag.