The preview and some cogent analysis is here on Three Geeks and a Blog.
There's not much doubt that this constitutes the Lexis response to WestlawNext. The screenshots of Lexis Advance show folders, an enhanced results screen, a new form of search tool called the "issue trail," integrated Shepard's results, and much more.
Like WestlawNext, all material now available on Lexis will not be available when the new search system debuts this fall.
When combined with Lexis for Microsoft Office this may finally bring Lexis in line with the most recent trends in legal research.
Careful reading of the Lexis promotional material makes it clear that Lexis designed this product to fit the way associates are now conducting legal research. This confirms the new acceptance that legal search engines need to adapt to their users' abilities and styles of use.