the iPhone 5 will not be much larger as they will keep it a one handed usage product. I have large hands and when i used the Samsung Galaxy III i could not do some functions without using 2 hands....... Too bad because its a really nice phone/device.
I did really like the Samsung Note, really convienent for just what they market it for..... A modern note pad and tech device.
My thoughts for the new 7" iPad would be, say you are using it to browse the web and you get a call on your iPhone (its in your pocket ) you could answer the phone from the 7" iPad and also look up phone #'s and emails while you are on the call still. Basically the units can be connected together and in sync at user defined levels.
At a certain point of wanting too many features, you should think about getting a 11" Air, thats a really great & small fully kick butt laptop that delivers some serious performance for its size.
And another thing that i have to give props to apple for ....... Battery life. They seem to do it much better than others as i have experienced.