I don't see drums ever being replaced by anything, particularly not in live music applications. Certainly not if you want any kind of authenticity to the sound.
You can't really use things like buggy whips, or the horse and carriage as an apt comparison that leads to the conclusion that acoustic drums will be replaced in the same manner. In order to do that, you have to operate under the premise that something will come along that will do it better, faster, more cheaply, more efficiently etc. In the case of the horse and buggy, we ultimately came to the automobile with the internal combustion engine, which came to the modern stage of development in the late 1800s, and was truly modernized with the Model T Ford in 1913. Everything we've done beyond that has been a refinement of the same basic concept, and I don't foresee a time anytime soon where we'll eschew the automobile for something else. What else are we going to find that is going to be better, faster, safer, cleaner, more efficient, and here's the real kicker - less expensive? There have been some inroads with electric cars, but at present it's a competing technology that doesn't really check all of the boxes.
We can go down that road with a number of different things. Look at car tires. We're basically using forms of vulcanized rubber that are filled with air. There have been some advancements in airless tires, but the first practical pneumatic tire was made in 1888.
Bringing this back to the drum kit, in order to replace it with something else, you'd have to come up with something that can do the same job and sound the same, but be better, easier to play, more efficient, and yet at the same time cost less. Current electronic drums are expensive, and at best are a pretty big compromise, never mind the fact (that has already been pointed out multiple times) that the drum reached the modern stage of development with the advent of the Differential Adjusting Rod in 1913, but the basic design of the drum itself, appeared almost 8,000 years ago.
Drums are similar to hammers - it's a basic design that can be enhanced, but they will never be truly replaced with something else.