It's a shame that Chrome which appears to be on track to become the most popular browser by a considerable margin is proprietary software. And before I get a reply telling me that Chromium exists, I know that - but I also know that it's not Chromium that's popular.
I think it is also a shame for two more reasons: Mozilla wants to make Firefox look like Chrome, probably to replicate features which seem to draw users in, by changing the extensions API to make it less powerful, by supporting standardised DRM in the browser (though this is a different issue) etc. Secondly, we may see a world in which only Webkit matters, and standards no longer rule, similar to the situation with Internet Explorer years ago. This will also put pressure on Mozilla and other "third party" browser authors to support features just because Webkit supports them, or even to break standard features so that they render like they do in Webkit.
I'd probably get shouted at for thinking it would become a "monopoly", but that's exactly what it is, just not in the legal sense.