Well Apple have been doing this for years on all their iMacs.
The same weak point with all iMacs, which is graphics.
They refuse to fit a desktop quality graphics card in their desktop machines as, due to Mr I've's amazing form over function design, if they did it would simply overheat, so they stick in a notebook graphics chip, and iMac's run plenty hot enough with just that.
That's why I always disliked Steve Job's lies telling people Apple make THE BEST computer, when they never fitted anything like the best, by miles GPU's.
Shame Apple were never interested in that market as that's what drove PC development so fast.