Rpi 3 b+ & stream live

Hi, I have a rpi model 3 b + connected to a 10 ‘’ touchscreen each with its own power supply. I thought of using raspbian with chromium in kiosk mode which points to lovelace: everything perfect.
Unfortunately I have hardware problems for live stream of my cam: required resources are huge, in fact if I remove tab stream everything works fine.
Do you think the new rpi 4 is a good solution?
Thank you all