I think that doomsaying, is about as bad, as blinding saying that such technology would have no problems at all, and that it'd "all be ironed out". Which is ignorant at best, and dangerous at worst.
My entire point is that tapping directly into the human brain
is "close to the soul". If nefarious activities on the internet or phone tapping are bad, then this allows for an entirely new level of bad.
I don't trust my computer, and I don't trust the internet. You can never truely trust technology, and that's a good thing- that's why you have safeguards in place (antivirus software, backups, etc). And there's no garuntee that those are foolproof either (antivirus software will not block all malware, backup files could be corrupted, etc).
The good news is that it's all external. If it fails, I'm in a worse place, but I'm still alibe. I'd rather not have to worry about uploading antivirus sofware into my brain, thank you very much.
As far as I'm concerned, the amount of resources used in input/output devices is extremely minimal, and getting less as technology becomes more advanced and more unified (i.e. television and communication over the internet, etc). It is really nothing when you compare it to the huge amounts of waste that human civilisation produces, like the huge bundle of plastic packaging I threw away yesterday- resources wasted, that are just going to end up in a landfill. My input and output devices however see much use and have lifetimes in many years, and if they're lucky, will get recycled at the end of their useful lives. Of course it's motivated by laziness, and it's really sad when laziness is regarded as "progress" or "community".
Overall, it's almost as bad as suggesting the amputation of the limbs of space travelers- though admittedly the latter does not present any benefit whatsoever. That's the kind of lax bioethics, that really sets up society for thinking that controlling the thoughts of the population really
is acceptable.
The populace really deserves more credit than they're given. I would not call the people protesting in Egypt "sheep".
Ideological control of the population might be attempted by governments (via propaganda, etc), but it is still nowhere near denying people free will.
I'm still really asking the question of what benefits this development would give, that would outweigh it's potential problems. There's nothing wrong with input/output devices as they stand now.