New chain (BTS) that will fork from BTSX and honor PTS, DNS, VOTE, and AGS... simple upgrade and exchanges will simply rename BTSX to BTS.
Buy BTSX gives you 1:1 stake in BTS.... and you just upgrade your wallet.
Buy PTS gives will give you a slight advantage if you are willing to let your funds vest over 2 years.
Buy DNS gives will give you a similar advantage if you are willing to let your funds vest over 2 years.
BitAssets, Accounts, and User Issued assets are unaffected.
I will only be focusing on BTS and it will incorporate the features of DNS, KeyID, BTSX, VOTE and Ethereum on one chain called BitShares (BTS).
Play/Music are currently planning their own separate chains that will borrow our technology but still plan to honor PTS/AGS.
*note....whether or not the PTS/DNS price reflects a fair discount is hard to say.
PTS & DNS will continue as a chains that must find and grow the own community and leaders.