How, er, fast does it go? 

With some of the amazing specs of the Raspberry Pi 4 I wonder if the 4GB
version would be fast enough to replace a desktop PC - just for basic computing
such as web browsing, word processing, spreadsheets, file handing etc.

I ask because I have just been trying to use Twitter via Chromium on a
Raspberry Pi 2 running Raspbian and Twitter was unusable. Half the tweet could
be typed before any characters became visible and clicks within the text would
take a while to move the 
cursor. 

So what do you guys think about how fast a 4GB RPi 4 would be in comparison?

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