How much graphics processing power does your text editor demand? How about your build server?
Apple made it pretty clear in their keynote they're focussing this product to be attractive to the 'pro' market that gives zero fucks about a whiz-bang graphics card.
You can build a similarly spec’d PC for maybe $1500, with a better GPU, but 20x as large, not silent, higher power consumption, etc. Many trade-offs, not for everyone.
Apple made it pretty clear in their keynote they're focussing this product to be attractive to the 'pro' market that gives zero fucks about a whiz-bang graphics card.