So I believe if you go to @stan profile he explains it in depth about how they are going to basically do a
1 for 1 trade for current bitcoin so you can smoothly migrate all your current over to the new chain.
Not exactly sure on the technical aspect of it but definitely check out @stan for his posts. He has the all the details on his steemit account.
Not a trade, you keep your original coins :)
I found it! I thought I'd read somewhere they were going to give it away.
https://steemit.com/bitcoin/@stan/bitcoin-united-btc-u-offers-3-second-confirmations-and-massive-throughput
Relevant portions:
will do, thanks!