See...those are great points. You can dual boot another OS on a MBP and that lends the device to more uses and adds value and versatility. But it also adds to the price. The cost of Windows...then maybe say Office can add hundreds of dollars to the laptop. It can be looked at different ways....either it is costing that much......or saving that money from buying an additional device......I'm back to leaning not to buy it. I figure I can put my $$ to better uses. It is a lot of money but since it would replace a laptop, that means replacing my rMBP and while only Ivy Bridge, it has a nice dGPU, 16GB of ram and 256GB SSD.
With the rMBP I can easily set it up as dual boot for both windows and OSX so I can use windows when I need to or OSX (I've gotten tired of Vmware and the performance issues)
I think I'd be giving up too much with the SP3, though its a damn sexy device and I can see it replacing my rMBP but since I spent so much moola on the rMBP 2 years ago I hate to replace it.
But i don't see the SP3 as a true full function laptop replacement. Maybe a netbook replacement......Then when creating content say on an uneven surface such as the living room sofa. How does the SP3 hold up ergonomically? Does it balance and rest like a laptop does? I work from home a lot....i can balance my work laptop on my lap on the sofa and do emails all day long. I can create Word and Excel docs with relative ease......i can video conference and my work laptop rests and balance on my lap effortlessly. Can the SP3 do that with the snap on keyboard?