Have you looked at the new Windows 8.1 tablets such as the Dell Venue 8 Pro, Lenovo Miix 2, Asus VivoTab Note 8, etc? They're essentially 8" tablet PCs and could easily replace a laptop depending on what your usage requirements are. Android and iOS devices are pretty much all the same IMO. Tablets don't really add anything new that smartphones couldn't do... other than having larger screens. If don't have a smartphone already, owning an iOS or Android tablet would be good. Otherwise if you do have a smartphone, you may want to consider a Windows 8.1 tablet (with a x86 processor, not the crippled ARM ones running Windows RT).

I got the Dell Venue 8 Pro to perform all my portable needs. It can run desktop programs such as Lightroom so if I ever do an extended tour, I'd be able to process my photos without carrying a laptop.