I think possibly the quicker your trading time frame the more monitors etc reqd. I've done both, intraday and EOD, intraday requires faster reactions hence more info needs to be presented instantaneously.
I've done both, or tried both -- both big screen TV(s) and my 14" laptop...you'd think Size Matters....that Bigger is (of course) Better. But I found the big TV screen to feel really awkward and huge and stretched and not comfortable at all. I felt like I was inside of an oven being cooked by radiation, or inside of a movie theater...with my eyeballs and head constantly moving all over the place , Trading, or not,... I find just one 14" (or smaller) laptop to be the right, perfect, ideal size.
This is why most traders fail haha, they think that they can actually process all that. Without automated help there is no way you can use all that stuff