Well, "wireless monitors" are realy just marketing... They're realizing that they've finally spent the millions to design "web tablets" just in time to find out that they aren't too usefull for much besides surfing the web, and maybe collecting signatures as you deliver packages.... So they've taken these same wince tablets, put a stand on them, and now call them monitors...
Used laptops are the cheapest way to get LCDs that I've found... I'm looking to add two dumb terminals to a network that really only need basic terminal emulation with a very small phyiscal footprint, and can't find anything that comes close to the price of a PII laptop.
Matthew