This has to be one of the worst developments I've ever seen regarding search engines.
If Google actually makes this change of removing the URLs of listings, you won't be able to spot a malicious, spammy, or poor quality domain, and you'll waste a lot of time visiting websites that repulse you, but somehow got a high SERP ranking.
Many people, and especially web savvy professionals, look at the URL (web address, starting with http://www. ) to decide if a webpage or website is worth visiting.
Let's hope this test is abandoned and never implemented. Otherwise, the Age of Blind Web Navigation is upon us.
Here's what search results without URLs looks like: