What makes the MBP unappealing even if you don't need a tablet (the lack of kickstand in 13,5" tablet diminishes the usability as mobile display but it's not clear what would've been compromised if it had a stand) is that 15" wide screen MBP is even less portable than my current 15".
Then at ~13" MBP only has 800 vertical pixels assuming 200% zoom is used. The smaller size and weight help with handling but it still is not optimal.
The more portable the device is supposed to be, the less the wide screens make sense as you're not only making it harder to balanced when handling/carrying but also cutting the vertical resolution when horizontal, or horizontal space when held like phone.
Now as the video review already showcased some handling concerns
- it moves around easily on smooth surfaces like airplane trays, glass tables - you see the device even moves when the reviewer tries to open it up with single finger due to this
- unclear if the magnesium case is at (dis)advantage when handling it, eg. is it more/less slippery
- the review units so far appear to be a bit rough in the edges - in the advertisement video the device looks smoother or maybe it's due to the different lighting - the residue/scratch left in the table support this
Possible "solution" even if a bit ugly (if ugliness is for functional reasons, a good marketing dept can turn it around to a positive) some 2cm wide high friction strip at location where your fingers might be when carrying/grabbing it. So even if you lifted the device in unbalanced manner, the friction from the strip to the grip would be enough to prevent it from dropping from your hand. Would need some empirical testing to determine if say having these strips at front and back end of the bottom would be enough, that would avoid visible ugliness at the top. Though I think the current Windows logo on the device top cover already looks a bit ugly - You could probably make a kickstand sized Windows logo so the kickstand looked like the Windows logo when the kickstand was not in use.