No more monitors?

As I was doing some new workstation installs at work I started thinking about monitors and future purchases. At our school about 50% of our desktops have 17" DVI 1280x1024 LCDs, about 25% has 15" DVI 1024x768 LCDs and only less than 25% of old CRT monitors. Once we have enough LCDs to outfit the whole school will we need more monitors? Where to you go from a 17" LCD, sure you can get a 19", 20" or 21" but cost is prohibitive and up side is minimal. I think within the next 12-24 months we will start buying new computers without monitors. Which will dramatically reduce cost. Something to think about especially in light of recent stories of bottoms falling out of LCD pricing.