This would be a lot of work ... and we'd have to come up with reactions for all the existing electronics (and I assume this new electricity would be able to turn stuff on / off). Such a major change is unlikely to happen unless someone comes up with some really solid ideas and volunteers to program it.

The problem is that to simulate that, you'd need a full-blown electronics simulator built into TPT. Electronics simulators rely on having a known network of components obeying global laws (Kirschoff's voltage and current laws, law of inductance etc.) while TPT is based on an array of isolated particles obeying local laws (particle is in position x, there is SPRK next to particle, therefore conduct).

For example, in real circuits, current will only flow in closed loops, whereas to simulate the same thing in TPT, you'd need an update function for any current source (like BTRY) that says "Check all possible conducting paths from this particle, if it loops around, then conduct". You'd also need to sum up all the voltage drops across all types of components (resistive, capacitative, inductive) and solve a system of equations as large as there are particles in the circuit (order of 1000 variable) in order to find the currents. All this adds up to a truckload of calculations every single frame to simulate the circuit realistically that would create too much lag to be playable.

You could theoretically define a fictional set of voltage/current laws that are easier to calculate, but that would just give confusingly unrealistic behaviour that can't really be used for in-game logic, unlike the current SPRK.

If you want realistic electronics simulation, then use something like this:

http://www.falstad.com/circuit/