Microsoft never claimed they wanted to hit the prestige of name like Apple did with their mac lineup. the Surface lineup is meant more as a lower volume example to OEM's of what microsoft believes the "ideal" hardware for their platform is
OEM's, like always, have just been really slow at changing direction, where Microsoft, who didn't really have a hardware lineup before, was able to do so quickly.
we're starting to see in the last year, competition trying their own versions of "surface" devices, that all tend to be cheaper than Microsoft's own offering, and I think Microsoft is perfectly ok with this (remember, a windows device sold is a windows device sold, regardless of who actually makes it)
I never felt that they claimed that, I just didn't see why they were making these then as they don't sell all that well and there's a ton cheaper that do the same thing. But yea, I guess even if they are showing their competition how to make a better windows machine, they still get their windows money.