Arc for iOS is out today. It's already (at least temporarily) replaced Safari on my phone dock. It's because of two things:

1) it shows me all the tabs I have open on the desktop, but doesn't itself turn new webpages into tabs unless I explicitly choose to do that. That makes it perfect for looking things up and then quickly moving on.

2) it launches tabs that are things like YouTube directly into the apps themselves. I didn't know I wanted that but it's so brilliant.