In order to answer this we would need to know what you intend to use your computer for.
Most people just surf the internet, buy stuff on ebay, and check their emails.
That little Samsung tablet will be able to do all that for you. I have seen them in Tesco and they are undeniably neat little things. But that tiny screen might be a tad tiring on the eyes if you had to use one for a long time.
Also it depends on what you are used to. Personally I find using a touch screen a bit annoying, as I have been using a proper computer since the mid 90's. I prefer a real keyboard and a mouse. I know its controversial to say this but I actually prefer Windows as well !
But, again, its up to the individual. Find a friend with a tablet, borrow it and see if you get on with it. If you use a touch-screen Mobile phone, than you probably know what to expect.
Notebooks are just another word for a small laptop. I have a super Acer Aspire One, that I use when I am away from home, mostly when staying in my caravan. It has an 11.5 inch screen, which is just about right. I have a Three Network dongle and I am able to do everything that I can when I am at home. The exception to this is that the Acer doesn't have a DCD drive. But Tablets don't either.
Its horses for course I'm afraid,
Hope this has been of some help !