Conina on 31 August 2014
The sales of desktop computers and desktop GPUs are falling, but still at around 200 million desktop GPUs/APUs are sold each year: http://jonpeddie.com/publications/market_watch/
Keep in mind that many desktop PCs have 2 GPU units nowadays, but even then are GPUs for 100 - 150 million PCs sold each year... that's not "niche".
