Thanks to CG Cookie I have a decent first attempt at creating a realistic laptop, but, it’s not quite finished, there’s something about it that gives it away. I used an HDRI and 16 transmission/diffuse bounces, but, how else can I increase the realism? Does turning up the samples always tend to increase realism? Because here I’m using 64.
Here’s a random add I found online, and then below that is mine

One approach I thought of is to create other miscellaneous theme items, like let’s say a cup of coffee and a notebook, and place them a little distantly out of view but still on the backdrop, though I don’t know if that’s actually going to help or not.