Starting this week we’re making it easier to quickly find great images right in your Google search results. Drawing from last year’s broader update to Google Images, we’ve integrated many of the features we introduced at that time into our main search results. Images will now appear in a tiled layout, with hover previews that give you a larger thumbnail and more information about a particular image
Additionally, if we detect that your query has “high image intent” (meaning, we’re pretty sure you’re looking for images) we’ll start showing more images on the page. If you add words like “photos”, “pictures”, and “images” to a query, that means you’re probably not looking for a blog post or video. Showing more images on the main search results page makes it just that much faster to find the image you’re looking for.
"Improve" is subjective. For those who don't want their normal text listings shoved down below the fold or over to page 2 because those 4 rows of images just took up the whole screen, "improve" is not the word they'd use.