Tablets are considered "large" if they are 10-15 inches. The larger the screen size, the larger the working area is, which is especially useful if you're using a tablet as a laptop replacement.
Boox may have announced the Note Max last year, but only today is it officially available in the US, UK, and EU for $650.
Gaming demands a large screen. Android supports large-screened devices ... on touchscreen input are popular, but the sheer size of a tablet can make them awkward, depending on where the controls ...