Have you ever heard the expression 'jack of all trades, master of none'?
I think that's likely to apply here too.
I've been an Apple user since I used OS7 on a LC475 and have been an Apple fan ever since.
As well as my Macs I use an iPhone, iPad and an iPod, but I agree entirely that implementing everything found on a portable device into a desktop interface is a backward step. It's doesn't 'simplify' anything as is claimed, it just makes it messy.
If I wish to tweet I launch Twitter, if I wish to read emails I launch Mail.
I don't wish to have iCloud attempting (google style), to set everything up for me on launch, nor do I wish to get 'alerts' on my desktop - that's just interrupting and distracting me from my work (which is what I do on my Macs).
I shouldn't have to 'deactivate', 'uninstall' or 'work around' the things I don't need - that's exactly why I always hated using a PC!
Apple keep offering a solutions to problems that don't exist and often create some by doing so.
I'd rather see a reintroduction of colour sidebar icons in the finder (something genuinely useful that they REMOVED from Lion), that slows my productivity than all these additional 'gadgets' like mission control and game centre.
Apple really are starting to lose the plot IMO and if they are not careful they will start losing their customers too.