Looking on the internet deeply has found these results:

That would be great is the most popular phrase on the web.

that's good 119,300,000 results on the web	That would be great 150,800,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Forgive me, that's good, Dan. owner, but that's good. Not co Trial period, that's good. We got Maurice Owens, so that's good. But that's good if you're happy. A cabriolet, that's good design. You're young, that's good.	That would be great, if I could just dance with her. That would be great because I can't even draw a straight line, Bob. That would be great, but we have this dinner thing tomorrow so... That would be great. I'd love for things between me and Mom to get back to normal. That would be great, but I think he's talking about Phase B. That would be great, but I'm actually in the middle of a situation currently. That would be great, but I don't have any music in the car. That would be great, Earle, just not next week.

that's good

119,300,000 results on the web

That would be great

150,800,000 results on the web

More popular!

That would be great, if I could just dance with her.
That would be great because I can't even draw a straight line, Bob.
That would be great, but we have this dinner thing tomorrow so...
That would be great. I'd love for things between me and Mom to get back to normal.
That would be great, but I think he's talking about Phase B.
That would be great, but I'm actually in the middle of a situation currently.
That would be great, but I don't have any music in the car.
That would be great, Earle, just not next week.