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Put one of those in next gen tablet PCs (a la Microsoft Surface Pro) with good battery management and I am intrigued.
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The GTX 780m is NEVER going in a tablet. This thing is going to, in all likelihood have a TDP north of 100 watts, since that's what the 680M is rated at and this thing has more on die resources. Not only does that mean that the tablet would have to dissipate that much heat, but the GPU alone could drain the battery of the surface Pro (42 watt hours) in well under 30 minutes, not to mention the impact of the rest of the system.