1. Pleasant to work with,
2. Performant enough,
3. Butter smooth usability
... with HTML5 and decent browser support (and significant effort of front-end developers no doubt) without having to download an app on your mobile. Native SDKs are important, I agree with you, but future isn't in them.
It really depends on what you want to do. If all you're interested in is presenting a static(-ish) web page with some "extra" interaction, then sure.
If you want to do anything that harnesses the hardware or computing capability of the device, or anything more complicated the most basic HTML-based UI, then native apps are the way to go. This is independent of whether we're talking about mobile or desktop.
I really hope WebGL is adopted for the computation intensive apps, but yes you're right for most consumer needs basic static(-ish) HTML5 format would be sufficient.
Access to various hardware devices like the camera, speakers, sensors and the like are "basic" on mobile devices but for which there isn't any real way to access from HTML5 in a way that is useful or complete. It could be done, but then one runs into the performance/efficiency (in both development and end-user experience) issue again.
1. Pleasant to work with, 2. Performant enough, 3. Butter smooth usability
... with HTML5 and decent browser support (and significant effort of front-end developers no doubt) without having to download an app on your mobile. Native SDKs are important, I agree with you, but future isn't in them.