What does a laptop in the post-PC era look like? Is it an ultrabook with familiar internals and software in a dramatically slimmed-down shell? Or is it possible to use a modern mobile OS like Android, energy-efficient chips, and build something that bridges the gap between the portability of a tablet and the power of a laptop? Leave it to two companies with deep roots in the PC industry — Asus and Nvidia — to take a stab at that question with the Eee Pad Transformer Prime. It’s the world’s first quad-core Tegra 3 tablet, and not only does it have double the power of today’s dual-core ARM processors, but like the original Transformer, it's available with a keyboard dock that transforms the tablet into a more traditional laptop. On top of that, the $499 device (with 32GB of storage) has been slimmed down from its predecessor and given both an 8-megapixel camera and a brand new SuperIPS+ display. You can see why the package sounds like the perfect blend of tablet and laptop, but is it? Do the added cores enhance the user experience? And as a tablet, is it primed to take on the iPad — the frontrunner in this post-PC competition? Those are big questions, all of which will be answered in the review below.