It was such superior experience. If the user has it on his box the map link can simply point at the google earth client.

Take route planning for example. It use to be that you could fly the route in google earth. A line on a paper like map with a bunch of dots is useful for finding a shorter or more preferable route but after you've made up your mind flying over the road from A to B allows you to drive or cycle without any map.

If the application is installed the search results can include tours. (people made countless illustrated tours that kept breaking with each api update until there were no tours left)

Google could probably embed google earth into web pages if the will was there.

We will see where https://earth.google.com/web/ ends up. For now it loads as if booting an OS but its quite smooth after that.