most websites are fairly usable on tablets and need only limited adjustments to suit this environment. (In contrast, using websites on mobile phones requires many more design changes to accommodate the smaller screens)
when we asked people how they use their tablets, web browsing was universally mentioned as a top activity.
Should you build an app?
we advise most companies to stick to their website and invest the resources in improving web usability
Build a tablet app only if you can offer value-added functionality over a website, such as creating an app that is focused on supporting a single main task.
don’t make your tablet app a scaled-up phone app.
Jakob Nielsen’s Alertbox: August 5, 2013: Tablet Usability