Things like grand central barely got used? Source?? How would you even know?
This is how software works. OS makers give developers the tools to implement new features. Its up to the devs to use them or not. I really think we will see wide adoption of most of Lion's high profile features given enough time.
fair call on gcd, i don't know how widely it has been adopted. after a quick web search, final cut i believe does not, since its still carbon (but that may change tomorrow), cs5 sounds like it does (which is heartening, although i've had far worse performance from my adobe apps since snow leopard, but thats another discussion).
anyway, my point in all of this was not "lion WILL suck;" but the realization that many of the features may not be immediately useable, and i worry if cross platform developers might not want to add os-specific features making their software behave differently on different systems. as a result, that makes me leery of getting it straight away and dealing with whatever initial release kinks there may be when the flip-side benefits are still uncertain.
a lot of people seem to get offended if you speak your mind about concerns for apple stuff, and i'm not sure why. if nothing else, delayed developer adoption of features is at least worth raising awareness. many os features in the past have been stand-alone tools that start globally working for you immediately: spotlight, time machine, spaces, expose, automator, and so on. until recently i didn't even think about how the individual software devs would have to update their apps for many of lion's tentpole features; i naively assumed the magic os pixie dust would do all the work and i'd be safe from every overwriting or losing a document in a crash ever again. and i'm a relatively savvy computer user, so there's got to be a lot of other people who are going to go into lion assuming the same thing, and be posting angrily when they lose stuff.
with regards to stuff like launchpad, i'm not complaining about them, i'm just saying they're of little interest to me. i wanted to express my concerns about the features that do interest me without dismissive responses like "who cares launchpad alone is reason to upgrade."