Stop to use SL if you are not happy with LL.
Do you think it's easy to manage the infrastructure of SL ? A company need to look at the futur, it needs to invest in new solutions, new ways always... Go ahead ! without that, it'll die.
I use Sl since 2007, I'm owner of 3 sims, I use voice sometime, I use SL viewer 2.0... and more. Everything work not like a charme, sure, but globally it work well. Who know exactly where LL want to go ? There is a long long way before SL is mature, we start to touch the sky with our fingers...
So, about this web browser, I can't test it, but alll screenshot and video I saw, it's a very good solution. I cross my fingers guest can choose their destination more freely, we can embed it in our website with our sim as destination... There is so much application, professional, education, v-tourism, company showcase and more and more...
It's a beta test, let them ameliorate this new way for connecting people in our world...