4GB is plently enough RAM
for what I use a laptop for: something to take out & about, a bit of web browsing, ssh, libreoffice. It has a small 12.4" screen which makes a nice fit for my rucksack. I assume that I will be able to upgrade the OS to Linux Mint or similar.
My main machine at home is more powerful. El Reg reviewers always assume that everyone needs a lot of grunt, not true.
£550 is a tad expensive for a small machine to use on walkabout, there are others that are cheaper. Finding a small screen is harder.