One of the most talked over keyboard ever is definately the Optimus Maximus Keyboard. As you might/might not know, this keyboard features an oled screen in each keyboard button as to allow for full customisability. Its totally freakin cool and freakin expensive as it started shipping recently at about $1,860!!
As specified on their website:
“Each key is a stand-alone display that shows the function currently assigned to it. Optimus’s customizable layout allows convenient use of any language—Cyrillic, Ancient Greek, Georgian, Arabic, Quenya, hiragana, etc.—as well as of any other character set: notes, numerals, special symbols, HTML codes, math functions, shortcut buttons and so on to infinity. “