Not to quibble too much, but as with everywhere, this depends on the office culture. It's depressing but there are many places where people prefer to use Hipchat and Slack to ping a nearby coworker rather than bother to take off headphones to talk to the person several feet away.
I'm not sure this is bad in an absolute sense. If I'm working on something, the semi-asynchronous nature of chat (assuming disabled notifications) allows me to answer questions when it makes sense for my workflow.
Generally, confining in-person chats to blocking questions seems like a reasonable thing to do.
I do that, because that way my colleague can address my query at his convenience, rather than at my own. If we need to, we can then hit a conference room (or go into one or the another's office, if our employer didn't have a godawful open plan office) to discuss.
Sometimes the message will be "Lunch?" and we'll flap our meat to make noise on the walk over to said lunch, during said lunch, and back from said lunch. Or the carpool to/from work.
Nothing depressing about it.
Everyone is still big on the social part - most people all you need to do is ping then when you want coffee or tea and you'll get a message back or have someone at your desk ready to go in a moments notice. Once in awhile though, you get nothing until hours later, which is just a "busy" signal. (no one bothers with statuses since they either forget or no one pays attention anyways).
An interesting aspect of primate dominance rituals at companies with too many managers is demonstrating dominance by asking someone of lower caste to ask someone for you, and the top dog wants proof by a screenshot or forwarded email or whatever, not "yeah I talked to him and he said...".
Operational concerns about demarcations apply too. "I gave that customer problem to XYZ when I passed him in the hallway" is too unprofessional and results in poor customer support. I gave that customer problem to XYZ in written email format is very hard to "accidentally" lose or forget.
It's just that I can drop off a question, come back later to read the answer, we both have time to think about it, etc