What's the difference between the IPad and a laptop and IPhone?

I have a laptop and IPhone but interested in the IPad, tell me what it can do for me that the laptop and iphone can't. Why should i buy it.

Ok so a laptop can firstly run cds while an ipad can't. Laptop has a built in keyboard while you need to buy an external keyboard if you want one. Ipad is alot more portable than a laptop since its skinny and small. Ipad has an app store. You can't watch dvds on ipad you have to download them.depending on what kind of laptop you get, although most of them have this, all ipads have a camera built in for vid recording and taking pictures. Ipad also has a better camera.laptop may be work faster depending on the quality of the laptop. Ipad has no built in usb ports o you can't connect usb drives or anything. Ipad screen is smaller than most laptops. Ipad doesn't overheat, i think. Laptop can play cd video games like call of duty or battlefield, ipad can only play downloaded games.laptops tend to have more memory. All in all if you want something for like work and you use the computer alot get a laptop. If you just want something portable and do not want to buy an expensive laptop get an ipad.

Ipad is for apps and entertainment whereas laptop is allrounder

Greatest is hardware wise,
the computing speed of laptop is much more than ipad and iphone.
they are different product's and designed for different application…

an ipad or tablet device can be of use to read books or even watch movies while you are on the go without giving you strain, the reason you should buy an tablet device's are:-
1)ease of use and comfort, you can read in laptop or iphone while in bed
2)for entertainment purpose you can watch movies on the go (carrying laptop is really strain-full)
3)document's and office work can be more organised with a tablet device as it's screen size is nether too big nor too small(iphone).
hope, this help's you out
Regards
P.D