I have both a Surface Pro 16GB/512GB i7 and the Surface Go 8GB/128GB. I love both form factors. However, if your primary use is going to be the coffee table, definitely get the GO. I LOVE my Surface Pro and it's beefed up as it was my primary computer for work (I'm now retired) and had been my home Tablet when not working. However, as several mentioned it can get fairly heavy when using it as an eReader, casual gaming system, etc.
My Surface GO does a fair amount of coffee table time as we use it for those quick reference questions while watching shows. But I also use it a lot in my recliner for web surfing, email reading, an eReader (With the Nook app), Twitter reader, and casual gaming device (Microsoft Solitaire Collection, Microsoft Mahjong, Microsoft Jigsaw, and Microsoft Ultimate Word Games).
The performance on it has been good and battery life good. I also use it with OneNote as an electronic "piece of paper". I just finished a 6 week course where I started with my Surface Pro for class notes and switched to the GO when I got it. Both did a great job, but the GO was so much easier to use for note taking because the smaller size took up less room on the classroom desk.
I'm a big guy (6'8") and have the big hands to go with it. I'm also a touch typist and it only took about an hour for me to get used to the smaller keyboard. Yes, I wouldn't want to write a novel using the keyboard but it works quite well for a letter to family in Word, or similar.
For me, the GO has been the perfect device. I've left it in Windows 10 S mode as the apps I use are all available via the store. I look at the GO as my "Mini Me" Surface Pro. It's exactly what I wanted. Small, lightweight, and I can do everything I do on my Pro on it. I'm not saying it can do everything my Pro can, just that it can do everything I do with my Pro in a nice small convenient form factor.
In summary, I've always liked the hybrid form factor where I can have a tablet and/or laptop. For me, although the Surface Laptop is nice looking, capable device I have no interest in that form factor. My Surface Pro is my 4th Surface over the years (I did upgrades, not that there were issues with the others) and these two are now my only computers. I do my heavy gaming on my Xbox One X. I started with HP Tablets (With the rotating screens and permanently attached keyboards) back in the mid 2000's with Windows XP Tablet mode, so I'm pretty biased regarding tablets versus laptops.
I hope the above helps you make a choice. Feel free to holler if you have any questions.