A laptop is pretty much a mobile computer.
A tablet is a device that offers many of the same functions of a pc but in a handheld form and uses a touch screen.
is an example of a tablet, another example is the Samsung Galaxy Tab
I would Prefers to go with laptop
The tablet PC (I am speaking of the tablet PC in general and not specifically Microsoft's brand, Tablet PC, that works on the Windows XP Tablet PC Edition operating system) has met with both bouquets as well as brickbats since the time it has made its foray into the market. There are people who consider it to be the next best invention after wine and cheese and then there are others who think of it as a frivolous waste of technology.
tablets on the market, tablets are still quite new to the tech world. So if you are considering purchasing a tablet, there probably won't be much to pick from yet. As far as functionality, tablets are currently less capable than laptops.
Typing on a tablet PC is not terrible, but it does have a learning curve to it. Because typing is done on the screen, you must look at the screen to type, as there are no physical keys to use as a guide. I suppose that one could master the art of tablet touch typing, and get a good knowledge of where each key is. But still, you won't break any speed records typing on a tablet.