I play on the iPad and Windows PC.
I doubt we'll ever see the ability to make in-game purchases for real money in the PC version. There isn't an equivalent store that will supply the mechanics.
I don't know how difficult it is for LDW to tie in the device's keyboard to the game - other games and apps do it, so it must be possible - so we might see that one day; I know that it's often requested. I suspect the ability to have multiple games might take up too much space/memory for most devices at present - although in years to come, who knows?
To partially offset the items missing from the PC versions, interest is paid at 10% a day, and peeps' incomes are doubled. Still, I'd like to be able to use some of the new stuff in my iOS latest update in my Windows game!
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To err is human; to arr is pirate.