Thanks for the replies. I am familiar with using Windows to run multiple displays. It is definitely the hardware I am asking about. Sorry if I didn't make that clear.
I don't have a particular budget on this right now. I'm trying to determine if it can be done and for how much. The machine will run office environment applications: browsers, word processing, spreadsheet, Acrobat, QuickBooks, and Photoshop. Often several of those at the same time.
I am interested in the docking station concept. I always thought of the docking stations as being a convenience; more or less providing pass-through to your peripherals to get going more quickly. In the case of the Dell USB docking station linked above, it appears to be providing additional video capabilities. Does this mean it contains a USB video card?
Correct, the Dell USB 3.0 dock has a USB video card built-in. It's one of the most powerful models available because it can drive three displays at once (one 4K, two 1080p).
If you're buying new, I would recommend buying a laptop that has an actual hardware dock. Hardware docks work the best because you get a full-speed connection rather than sharing all of the plug functions over a single high-speed USB 3.0 connection, which can sometimes stutter a bit if you're doing a lot at once. For example, the Dell E-Port Replicator:
http://accessories.dell.com/sna/productdetail.aspx?c=us&cs=19&l=en&sku=331-7950
That passes through your laptop's GPU to dual monitors, rather than using a less-powerful USB video card. That's the best setup for performance. Another alternative from Dell is the wireless dock, which uses WiGig, which is actually pretty good:
http://accessories.dell.com/sna/productdetail.aspx?sku=452-BBUX
You still have to plug in the laptop for power, but it can be pretty much anywhere in the room rather than just on the dock, which is nice:
I have some users with Dell Ultrabooks who use this & they like it. I prefer the click-in hardware dock myself because you don't have to think about it...close your laptop, dock it, push the power button, boom - dual monitors, power, keyboard, mouse, etc., but the WiGig dock is pretty nice too since you can relocate your laptop to a different part of your desk. I've heard it hiccups from time to time but is generally pretty reliable. Obviously the click-in dock is the best because it's 1:1.