Forget spikes. The wear on the carpet would be a secondary concern, compared to the potential for damage to the floor panels. These are of a composite, honeycomb construction and any punctures will compromise their rigidity and strength.
The idea of some kind of spring loaded lifting device would also add weight to your design, which I think would be counter productive. In order to convince customers that your product is an improvement you need to be looking at reducing weight, not increasing it.