:shrug: Eating meat can't stand up to ethical scrutiny. It's only come under scrutiny relatively recently in our history though, so it will take a while for the cycle to complete. Eventually society will get to the point where it is illegal. It will take a while though.
Typical cycle:
1 - People come to an awareness about a potential issue
2 - Philosophers debate back and forth for several decades, and a dominant position arises, complete with proposals for social change
3 - The rest of society spends anywhere from a few decades to a few centuries playing 'catch up', gradually moving toward that position. This is because starkly asking one generation with one culture to drastically alter it rarely works. Instead, each generation makes incremental changes that they are comfortable with
4 - Social change initiated at a legal level, some generations down the track
That's the cycle that suffrage, abolition and other issues have followed, and looking at the status of animal rights in current intellectual debate, it will likely follow the same course.
Everything can stand up to pretty much anything when it comes to philosophy ^^ I could argue that since cows, hens, pigs etc. aren't advanced creatures and therefore their feelings lack meaning (I wouldn't though, because that's not my standpoint =))
Ethics aside, I eat meat. And I like it. That said, there is an issue with meat, which is how much it takes to produce it. To grow animals for slaughter you need to spend a huge amount of area to grow fodder, give the creatures space to roam etc. It's hugely ineffective energy-wise. At the same time, we're moving towards a society with a larger percentage of the worlds population becoming middle-class citizens, Asia especially. And as they achieve this status, they'll begin consuming, and they'll want to consume more meat like we've been doing for so long.
Simply put:
More people are born
A larger percentage of these people will be middle-class citizens
A larger percentage of people will want to consume meat
This is actually a bigger issue than it seems, and unless a "solution" comes along (bio-industrially manufactured meat or even mass-deaths of people from disease, war or such, though you can of course argue if this could even be called a saloution =/) we might be forced to rethink our meat habits.