It's possible that Intel might have to claw back Xeon pricing accordingly to defend their market share.
If a developer/pro/etc. need 18 cores, most of the time they'll be OK with a top-end i7 -- I think. Therefore it is fair to compare Xeons with i7s, they're not the same but yes, they have overlapping target audience when it comes to desktops.
Not if they need ECC RAM - and if you've got enough professional stuff to fill 128GB of RAM, you really, really need ECC RAM.
(No 128 GB RAM but you're not getting that with a desktop i7 either. Oh and the new HEDT platform that also has "i7"s⦠not all chips will support quad channel RAM!)
the funnier version: https://www.youtube.com/watch?v=Xah84cJwdxE
http://i.imgur.com/EZ6LyI1.png
http://i.imgur.com/tbwNbdh.png
EDIT: by mistake I originally linked this video I had in my clipboard: https://www.youtube.com/watch?v=5scez5dqtAc