I agree with you 100%. I meant that if they go the 14 inches route it might come with an increase in resolution. I think they will want to compete hard with the 2732-by-2048 of the iPad Pro.14" won't necessarily mean you'll get line wrapping. It's more a function of resolution. That said if MS can increase the screen to 14" by reducing the bezel and keeping the size increase to a minimum, then I'll have a hard time holding onto my money!
But I'm skeptical of a fanless solution. I run my SP3 pretty hard and I feel better knowing the fan is doing its best to keep it cool. I'd be afraid that without a fan, throttling will become an even bigger issue than it was with the SP3.
By the way, I spoke to a guy from the Microsoft Store today doing some research about trade in (just in case ). He said that right now there is nothing but a recycling buyback, but when the SP4 comes out most likely there will be a limited time trade in for SP3s that is 'generous'. He said when SP3 came out it lasted 1 week and he remembers it was 'generous' but didn't give me details. It would be interesting if anyone knows more about it to post here. That might help us out a little bit if we bite for the SP4 ....