Dolphin HD, one of the most popular Android browsers, has been pretty unusable on large tablet screens due to choppiness and lag caused by the CPU having to work with a much bigger area. For example, when we got a demo unit of the Galaxy Tab, the problem was quite apparent to the point of Dolphin being downright frustrating on relatively complex sites.
Android 3.0 "Honeycomb" came to the rescue with hardware acceleration capabilities, which allowed shifting all the UI processing from the CPU to the GPU. However, since the first Honeycomb tablet, the Motorola XOOM, launched 2 weeks ago, only the stock browser has been offering the benefits of hardware acceleration and allowing for very smooth scrolling, zooming (xooming?), panning, etc, while Dolphin remained as choppy as before.