Only if you pay.
The resource (and battery!) usage for "native" streaming is so much lower than the browser version. You can freely leave it in the background while doing other things. Plus, you can force a 1080p feed. (All without paying.)
The issue is that the source is HLS which most desktop browsers (with the exception of Edge and Safari I believe) don't support. I've used twitch with flash disabled on Edge but there's often problems.
Presumably the new beta html5 player (which requires turbo subscription for now) works around HLS in some way.