Technology is advancing and definitely, new improved systems will emerge which will want to be similar to Bitcoin or perform a totally different role quite different from Bitcoin. What ever technology that will emerge that bears similarities with Bitcoin will never be Bitcoin, it can be called a different name. But what I do know is that Bitcoin is not a stagnant system/technology. Over the years, there have been lots of improvements, Bitcoin will keep improving to match up with the latest technological trends.
New projects can always appear and some may offer new features but that does not automatically make them the next bitcoin. Bitcoin is already something that newer projects still struggle to build, which is trust. It has beeen tested for many years, survived different market cycles, and still remains the main reference when people talk about crypto. In my opinion, future technologies may become important too, but they will probably have their own use instead of replacing bitcoin.