But the possibility to add more data to the chain could open new possibilities for feature on second layers.
It's already possible with RSK or Liquid (sidechain) and RGB or Taro (using LN). But on-chain remains popular option for now.
--snip--
I wonder how are these ordinals being created anyway? Like is there a special software that will mint some arbitrary (image) data but with dedicated addresses for this purpose?
Ordinal provide software/wallet called
ord, see
https://github.com/casey/ord. But since it require Bitcoin Core, i expect there should be SPV/light-weight version which i don't know yet.