I believe that rendering is not the bottleneck for Second Life, getting the data from
SL machines to your graphics card is. If Nurien actually stores content on your hard drive they could go a long ways toward removing that bottleneck, however, once any content is on personal hard drives you can pretty much forget any ownership of content unless they can figure a whole new way to handle it. With solid financial backing and support of companies like Nvidia they are likely to be worth keeping an eye on though.
Tess