Sony's Digital Paper was made to replace all the paper your office uses. A tablet that's made for office work, the dispay is 13.3-inches and is able to display full-page docs in PDF format. You can use the stylus to write and erase right on the device.
Sony boasts that the tablet can last three weeks on a single charge and can store around 2,800 PDF files. There is 4 GB of storage built-in, but if you need more, you can insert a micro SD.
With the tablet you're able to share, annotate and save all the documents you and your coworkers are collaborating on. The tablet comes with a price tag of $1100, but you'll never have to buy paper for the office again.