The mania that mall culture spawned a decade ago has barely had a chance to die down before retailers upped the ante with the specialty superstore. Imagine if you will, multiple floors of HDTVs, laptops, home theatre systems, portable music players and other things that go blink in the night. A far cry from the little shop around the corner and a dream come true for even the most particular tech aficionado. But is there substance behind the sparkling facade? The PC World team spent a day covertly shopping at Croma, E-Zone and Reliance Digital, and this is what we found.