It peaked at 4.05% in March. The last 2 months it went just below 4% as the Unknown category increased. For June the reverse happened, so 4.04% seems to be the real current share of Linux on Desktop as desktop clients were read properly/werent spoofed.
But we’re talking about proportions of Desktop operating systems. People using the desktop less might decrease (or slow the increase) of total desktop usage; but there would need to be more reason that just that for it to impact Windows disproportionately.