I think it is a good conclusion. I certainly will be pushing all friends, family, and otherwise towards Chrome. There's no sign their model will go awry -- they are already ahead, in my eyes.
There are just too many great features, for grandma AND developers, that I can't pass up the simplicity of a single platform. There's absolutely no reason my non-technical consults should have to bother with upgrading their browser, hacking their extensions, and dealing with performance issues.
Chrome's ecosystem is headed in the right direction, and it is owning up to a lot of its faults and addressing said faults in droves. There's a lot to be said for Chrome's _rate_ of success, when predicting the future.
Firefox 3.5 and 3.6, both fairly significant releases, barely touch the charts, with respect to Chrome. FF 4.0 is going to be great, so I don't expect many to leave the platform, and I think it's fair to expect Chrome to be its equal.
IE9 is also shaping up to be a good platform -- better than 7 or 8 hoped to be. It too will probably capture a lion's share of its zealots and the Windows platform, but there is no reasonable justification for the tech savvy to continue pushing others onto more stable and paced browsers. IE team still need a bigger fire under their seats, and we'll hopefully see a worthy opponent for a three-pronged, browser shootout.