iPad is an excellent device, but still has the shortcomings of iOS (e.g. Steve Jobs decides whats good for you, multitasking "like" ...etc).
To succeed, An Android tablet should:
- Be cheaper, or at worst only slightly more expensive iPad at similar configurations (i.e. 3G, Storage size)
- Not be limited to a market. Be available worldwide
- Have a very nice, and very smooth interface (Android 3.0 Gingerbread ... this is your holy grail)
Failing any of these points, will result in anything between a modest success to a lingering failure.
Just saying #justsaying