Google had finally improved the desktop online version of Marketplace. The layout and appearance is now much better but I find it still to be half-baked.
At the top are the 3 navigation tabs of Featured, Top Paid, and Top Free. Selection of the apps is easy - one just need to scroll up and down , select the app and the details are displayed on the right hand side.
Lacking features are not all the applications available in the Marketplace is shown, just the top versions and I find most unforgivable is the absence of the search box. Hope to see these in the next release update.