I would say it's never been better!
As others have said above, you can reach a bigger audiance than ever before!If you do things right and expose yourself to others it is possible.
But nothing comes to you without working for it.If you are certain that this is what path you want to take in life then go for it!
It is difficult yes, with today's competitive nature, i won't lie it is, but it is not impossible, nothing is.
I for one am certain that i want to remain in the field of art, maybe i will have to take part time jobs next to it, but that doesn't really bother me.It helps me go forward.In 2-3 years i was able to raise my artistic scales to what i have today, i take several commissions for a descent payment whenever i can, so i can't be sad with what i have achieved so far.
We need art for everything, from commercials, illustrations, conceptual artwork, to many other things!
I think the statement still lives, that if someone truly chases his/her dreams it can come true.
So, i would say just grab a pen/pencil, a good ol'sketchbook and start practicing! ^^