Are those pinned tabs all running applications or merely displaying information (websites)? Are you sure the ones running apps would not run better were they written as a native/desktop version? Are the apps trivial (e.g. to-do lists)? There's a lot of context you left out.
Some are just websites, but I would say many of them are full blown apps:
Gmail - email client
Mog - Music player
Google Voice / MightyText - Messaging
TweetDeck - Twitter client
Confluence - Team wiki
Trello - Organizational tool
Toggl - Time tracking
Bitbucket/Github (I suppose you could debate that these are
just websites)
Google Drive - Document editing and storage
Would these run better as native apps? Probably, if you're just talking about raw performance. However, I frequently jump between OSX, Windows, and Linux machines. When I open Chrome on any of these devices I can pick up right where I left off. Could I say the same with a native app? Probably not. For me, the performance of the web version of these apps is good enough, so cross platform compatibility becomes more important than raw power. That's what I meant when I said it depends on your definition of inferior.
I don't think mobile hardware or mobile browsers are quite there yet. But I don't see any reason why they won't eventually get to a point where they're "good enough" for people like myself, at which point other factors beyond raw performance will become more important.
