Everyone I know with a tablet doesn't touch them after a few weeks. I think you need to get something with a keyboard.
All the features you never use on your phone, without the ones you do i.e. calls and text. And no keyboard so half of those features are a nightmare to work if anything involves typing.
I got a Samsung Note as afaik it's the only one with a pen which means I can have clients sign contracts more quickly. I would like to show presentations on it but I don't have the energy to trawl through 100 slideshow apps made by teenagers in their bedrooms to find something which will actually do what I want. So I gave up on that.
Instant on like a phone.
Battery life like (actually better than due to lack of use) a phone.
The pen for signing documents.
For everything else I go to my 2 year old phone or 5 year old laptop. Tablets are a case study in marketing hype.
It all depends on your use case, tablets work for the content consumption model, which the majority of users are and tablet sales reflect this (there is a massive shift is sales from laptops/desktops to tablets in the global market). However if you create content they rapidly show limitations, apart from Win8 all in ones (convertibles, dockables and flipables). These are excellent all rounders but are too expensive, when these atom powered devices hit the price they should be at (they contain netbook grade Atom CPU's so should be the same price as a netbook) they will start to rapid gain momentum in the market place, this also assumes Windows 8.1 delivers the improvements that users want.
Part of my job is to assess and analyse these devices for a large IT organisation so I have had access to a lot of different devices that aren't yet in the market place.