Yes. All original (V1) micro:bit(s) will continue to work in exactly the same way and will be supported by the apps and editors.
You will still be able to use all your resources in exactly the same way too.
Any programs you create that use the original (V1) micro:bit features will work on your original and new version (V2) of the micro:bit, though you will need to connect headphones or a speaker to the original micro:bit (V1) to hear any sound.
We are working with accessory makers to ensure micro:bit accessories work with original and new micro:bits.