Yes, I know how weird that sounds.
Last night a couple of bloggers over at Android Central noticed that a new version of the Marketplace was now available in the Android Market. Based on the desacription, it looks like the new version has been optimized for tablets:
Optimized for the tablet form-factor and Android 3.0 (Honeycomb), Android Market now makes it fast and easy to find the best app for you
It disappeared fairly quickly, so there's nothing to see now.
via Android Central