Remember, though, that with Trek (as with all science fiction) we have to accept that the mere showing of futuristic thing A in use does not necessarily mean that the logically following futuristic thing B would be in use.
With Trek, we have to accept that warp drives and transporters coexist with user interfaces that consist of hundreds of colored, unlabeled plastic push-buttons, and with advanced communication devices that can carry audio only. If we truly speculated upon the research and development needed to create warp drive and transporter, we would find it unlikely to the extreme that our heroes wouldn't have mind-controlled computers and fully visual communication devices.
Unlikely to the extreme, yet there it sits, smack in the middle of the Trek universe. So we have to invent rationales as to why Trek gives us certain futuristic things but not others. We can never claim that Trek "should" have something because it has everything needed for it, because what actually "is" on screen always trumps what "should" be there.
The saying about the impossible being easier to swallow than the highly improbable holds true, of course. But sometimes we have to swallow the highly improbable, because that's what we get, and that's what the stories grow out of. Trek as we know it wouldn't work if the computers were mind-controlled, and the communicators had visual feed: many a plot opportunity would be lost.
Trek isn't "the" future, it is one out of the zillions possible. If it at some point becomes dramatically necessary to say that a Constitution class starship cannot lift herself from surface to orbit, we have to accept that and work out a rationalization. Now that's a bit difficult to do when we have seen other classes of starships operate out of planetary surfaces and atmospheres with trivial ease...
But let's say it becomes dramatically necessary to show the Constitition class being constructed on the shores of San Francisco bay. Again, we can and will rationalize, and this time it's easier going because we haven't exactly seen anything that would preclude this from happening.
We may have to invent several centuries' worth of pseudohistory to justify why this happens - but then again, we already have to do something like that to explain why only the Borg are cybernetically enhanced, why Data is unique and artificial intelligences don't coexist with humanoids or indeed rule over them, and why Kirk wears clumsy laced 1960s boots that would be out of place in the seventies, let alone the 2260s.
A future where NCC-1701 is welded together on Earth is possible. It's a weird one, to be sure, but so is the rest of Trek. And it's not a major doze of additional weirdness when we think it through.
Timo Saloniemi