GigaOM: As the owner of an original Galaxy Tab 7, many readers were surprised I didn’t buy a Galaxy Tab 7.0 Plus when it arrived on the scene. Frankly, I didn’t think there was enough “plus” in the refresh to be worth the upgrade cost. So I waited. Now that Samsung offers the Galaxy Tab 7.7, my patience has paid off: This small slate and its high-def display offers big performance. Let’s see how much, compared to the quad-core Transformer Prime and some other Android devices.