According to JetBrains, some features will go to DataSpell first. When they become mature, they will add to PyCharm. So yes, it seems like eventually, everything should go to PyCharm. But I doubt they will always keep in sync, if JetBrains want to push DataSpell as a different IDE.
Written by Yong Cui
Work at the nexus of biomedicine, data science & mobile dev. Author of Python How-to by Manning (https://www.manning.com/books/python-how-to).