Their own separate bin? I'm interpreting this to mean, electronics in their own bin, together, is fine. One bin for each laptop, tablet, phone, etc would be madness. However, I don't think a laptop and an iPad will fit into one bin without overlapping each other. So now we are at probably four bins per person including their carry-on bag as a "bin." This is really ridiculous and will lead to even longer, more chaotic…
Also, if they do need separate bins for all of these items, they'll run out of bins faster, which would be a pain for the TSA employees. I expect that if interpreting the rule strictly creates a hassle for the TSA employees (who have to cart the bins around), they won't take the strict approach.