I think the main pro's with the iPad against Android tabs (I've had both) are...
* Build quality far surpasses anything out there...nothing can even come close
* Retina display on iPad 3, again, far surpasses anything else
* App support. Both have excellent apps, but the Apple Store still has the edge
For me, when I owned an Android tablet, the instability of it and the fact that I had to have three different Internet browsers installed to be able to use my favourite sites was beyond my temper-tolerance levels. Yes you can easily add storage/USB to most Android tabs, but stability and compatibility is far more important for me. The iPad doesn't have HDMI built in, buy you can purchase an adapter to connect via HDMI.
And we shouldn't forget that whilst Flash compatibility is nice, it is officially a dead platform and will not be supported. Sooner rather than later, it will have pretty much disappeared from websites and they will all be HMTL 5!
Of course, it all comes down to personal choice. For me, I genuinely hated my Android (Acer A500) more than any other device I've had (and I've had a lot), whereas I absolutely love my iPad. Of course, there will be others with the exact opposite opinion
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