If leather was synonymous with high-end cars I would see your point but a $25K Hyundai has leather interior these days and a $280K Ferrai 430 Scuderia doesn't. So having leather doesn't make an interior/car look expensive anymore than not having it makes an interior/car look cheap. Especially this cloth. In fact IMO the stitching actually adds more character to the interior.
I might be in the minority with this point of view but honestly it is how I feel.
2013 E92 M3 with ESS VT2-585 SC, StopTech BBK, ESS Full Exhaust, and a bunch of carbon fiber ...