Short of redefining the laws of physics and thermodynamics, the invention of a heat transporter, etc. I do not see the possibility of a 15W or even 10w part in a Fanless design *ever* happening.I think this is a case where it's a half house on which is better. When i originally bought it i was a little annoyed that there was no magnetic locking for the cover etc, but after owning for a while, i actually really like that it just flops back, makes it feel just like a book and it has actually really grown on my compared to prizing the voer off my tablet cases.
All i'd like is same/more power (no core M please!) but with an if possible, fanless design.