LR vs PS, which do I need?

I was reading a Facebook post the other day of a photographer addressing whether they were going to subscribe to Creative Cloud, or just purchase Lightroom.  My take-away from the post was that they, in their mind, could do without Photoshop, but taking away Lightroom would be an act of war.  This appears to be a common discussion as people are a tad worried that Adobe may increase the subscription cost once people are hooked.  Personally, I dont see this happening, but thats for another discussion. 

This decision is getting little more difficult because each new version of Lightroom becomes more robust.  Of course, this decision should be based on ones work and workflow, but for me, I see the two working in tandem.  This video provides a little insight into my workflow and how I use the two applications.  

What do you think?

LR vs PH, which do I need?