Well Boyd, not to swing a hammer and shatter something, but I do think that would be a dream more appropriate for maybe a Service Station Set and not a department store. Lionel's strategy in placing sets in department stores is to reach newcomers, that is families with children. So that means compromises to keep a affordable price point, and compromises in content for play value.
A set of scale sized PS2 hoppers (unless this was new non-scale tooling) would hardly qualify as either newcomer play value or an affordable price point. Part of that "affordable" price point also means Lionel uses items that have already recouped their investment dollars, ie: usually tradtionally sized non-scale cars**. Though I suppose they could also use the MPC developed Standard 0 rolling stock. Bear in mind the last new rolling stock products developed for the traditionally sized, lower price range was almost 15 years ago, with the Waffle Box Car and the Spine TTUX Cars.
So dream on, but I'd say this is a very improbably dream for a department store kind of train set.
** The new 0-8-0 and Dockside steam engines of course are new tooling, but developed specifically to meet a low price point, and thus I think we will continue to see these items in many more starter sets in years to come so that they have a chance to recoup their investment costs.