One of the questions we ask in the BI Survey is which criteria people use to choose BI products. Buyers in The BI Survey don't seem to find Web support very important. Specifically relatively few mention it as a reason for selecting the product they elected. In fact, less than one in ten do.
Of course that does not mean that Web based BI tools are no longer used. It just means that as a product differentiator, a Web platform really is not of any great interest to buyers.
This is interesting because Web architecture is a priority areas for business intelligence vendor R&D, and marketing departments often emphasize the Web capabilities of new releases.