Pretty much. And those responsibilities and commitments vary year to year.
2013-2014 was a little rough with a 1-2 year old. 2015 with a 3 year old is a lot easier and way more fun.
2016-2017 should only get easier based on past experience with the added benefit of the kiddo traveling more easily.
By August of 2017 (possibly Aug 2016), the little guy will be in school all day and daily life will change a lot.
By the time the little guy is out of the house (well, he'll be 18) around 2030, life will change a lot again. I'll still be in my 40's at that point and hopefully not "old" yet.
I'll still be bald though.
I guess these phases of life run in parallel to the more traditional experiences of folks here. Folks are active in their 50's. Start to slow down in their 60's. Slow down dramatically in their 70's.