It is not really meant to be like a surface book, that is just 1 possible way to go. I pointed out 4 ways:
1) like the surface book, but I pointed out that this form factor probably can't be combined with a quad core. Ofcourse the surface book will be renewed this year, but they won't place a quad core in it. Probably just a i7 7500U just like the others, which is a powerful dual core, but I think it is not powerful enough for video editing
2) crossover between surface book and acer aspire R7/R13. To accommodate the extra weight linked to a quad core and the cooling solution for it, the connection between the base and the 2 in 1 could be made so that you can swivel the screen over the base, that way the mass won't make the thing fall over. If we are talking about 15" than it would be possible to place the keyboard (and touchpad) lower, so that there is a decent amount of free space close to the connection point, so that in laptop-like usage, the 2 in 1 can be slightly tilted without needing the heavier 2 in 1 to be pushed back for a good viewing angle, but can be pulled forward for a good viewing angle. That way the center point of gravity stays above the base.
3) the classic convertible 2 in 1. This would be easier since it is closer to a laptop than to a tablet. And they are already available with geforce 940mx which would be enough for video editing (although higher GPU would perform better, it would be a great improvement on the iGPU).
4) the formfactor like acer aspire R7/R13. In this the laptop base can be a real laptop base since here the screen will not cover the back in 'tablet mode' so cooling wouldn't be really impeded, something that manufacturers of classic convertibles do need to take in account. I guess here the base part would be the easiest to do, the hard part would be the hinge. But acer did achieve at making a decent hinge for it, so it would not be impossible.
For me it is not about a surface book, instead, I think that for what I want the acer aspire R7/R13 would be better since it gives you the advantage of a 2 in 1 but it does not have the disadvantage of a tablet formfactor (where quad core is almost impossible without creating a bulky thing) or the classic 2 in 1 convertible (where cooling can be impeded by turning the screen to the back side). But I can understand that there are people who have there preferred system (since the acer aspire R7/R13 is kind of specific) so that is why I thought about these 4 scenario's instead of just the one that would suit me the best.
I did also point out that I do know that quad core and dGPU wouldn't be able in todays thin convertibles, and that for me it wouldn't matter is it would be a bit bigger than the rest. After all, they would need to do the same if they want some power in it. And it is not that it should be less than 2 cm's thin (HP spectre 360 15" is 1,8cm and asus zenbook flip is 2,2cm thick). My laptop is 3,1 cm thick and that is easy enough to handle. I guess if the 940mx is used, it can get under 3cm thick.
about the price: if the hinge can be figured out and is not that expensive, I think the price would be more like a laptop than like a surface book. https://www.microsoftstore.com/store/msusa/en_US/pdp/Dell-Inspiron-15-i7559-5012GRY-Signature-Edition-Laptop/productID.333475500?icid=homepage_featured_1_DELL15_170216
Dell had a 15" gaming laptop with touchscreen for 1100$ in the signature edition. I guess creating a hinge for the laptop so that it becomes a 2 in 1 wouldn't add a 1000$. But ofcourse a gaming laptop based 2 in 1 can be to bulky or heavy for people. The 15" dell inspiron gaming 7000 is 2,5cm thick, and weighs 2,62kg and that is with a GTX 1050 Ti which I guess need more cooling than a GTX 950m or a 940mx and is bulkier, especially compared to a 940mx.