My mental response to those banners - particularly on aggregator sites, but also for content sites - is "does your app support tabbed browsing? Thought not." Lo

My mental response to those banners - particularly on aggregator sites, but also for content sites - is "does your app support tabbed browsing? Thought not." Losing tabs is an experience downgrade. Apps are almost always worse than the browser for a site that isn't actually an application.