These are such interesting accessories. Yes, they would come included with any iMac I would buy, but I really don't have a use for one of those right now.
I'm really interested in seeing how these would make working with my iPad mini and MacBook Pro easier. I'm delighted with the rechargeable internal batteries and extreme portability.
I find I do a lot of my emailing and note-writing from my iPhone and would like to see how these could make that easier, especially as I tend toward long form. I see carrying these with me everywhere.
I'm also looking forward to finding out what Force Touch can do in OS X El Capitan and perhaps more interesting, finding out what I can get it to do. Just the thing to encourage me to snoop around in those Force Touch APIs.
This also looks like a really nice keyboard for my Apple TV and that's something that has been needed for a long time.