TLDR:
The sBTC whitepaper proposes Stacks[1] and sBTC[2] as a layer-two mechanism for unlocking defi on top of the Bitcoin blockchain (DEXs, NFTs, and other dapps, etc.).
I've started deconstructing and analyzing it in relation to what it means for both Bitcoin and Stacks.
[1] https://stacks.co/
[2] https://assets.stacks.co/sbtc.pdf
