Ikea is alive and well in the USA with some 50 warehouses. Many of them are second generation at this point; I know only my local area but both the Burbank and Seattle Ikeas, which originally opened in the early '90s, have recently re-opened at double the area. Ikea, however, is geographically-based. They want you to go there, wander their maze, eat their meatballs and leave with a $40 end-table you didn't know you needed. Wayfair wants to sell you the same products but they want you to buy it from your couch. They have no brick-and-mortar presence. They also aren't interested in pursuing a unitary design theory; Ikea's website returns 394 examples of "lamp" and 98 examples of "table lamp" while Wayfair will not give you a granular answer on "lamp" and returns 22,693 examples of "table lamp."