So, for those of us who still have some vintage Casascius/Lealana/other physical bitcoins, I assume that if ever broken open to redeem the wallets, we can redeem the same coin both on the standard Bitcoin blockchain, as well as the Bitcoin Cash blockchain? Is there any reason it would be any more complicated than that?
Yes. All physical coins that were loaded with bitcoins prior to the 08/01/2017
Bcash creation, would contain both the bitcoin amount and the bcash amount.
This applies to all addresses that "contained" bitcoins during the Bcash fork.
There should be no complication with moving the two separate tokens from your
physical coins. But I would advise you not to separate the bcash only from your
physical coins, since the value of the phys coins in theory, should be worth more
over time, since you did not break the bcash out, even if bcash fails later.
In a future where bcash is no longer viable or has worthy value, the physical
coins that still retains the bcash fork tokens, are more valuable than the physical
coins that only retained the btc, and moved the bch. Physical coins are historical
collectors items and should not be compared to average addresses.
If you are planning to move (spend) the bitcoins in your physical coins, then yes,
you can also move the bcash then too. But I would not separate the bcash and
leave the btc intact, since that will diminish the physical coin's perceived value.