I agree with everyone else on the keyboard - they're enamored of the butterfly design (and it gives them flexibility to do something insane in the future - like keys with displays, since they already use individual LEDs to backlight). Battery-wise, the next improvement we see will be a new chemistry - they are (unfortunately) committed to going thinner every time... Who knows how close they are to a 20% improvement in energy density, which would bring back the 99Wh capacity to the 15". There are battery designs that are still basically li-ion or li-polymer batteries, but offer that level of improvement - not yet in large scale production, let alone Apple-scale production, but maybe not THAT far off. .
One important thing to remember about Apple is their scale - just because someone like Razer can get enough of some new technology to use it in a boutique computer doesn't mean Apple can get MacBook Pro quantities (or reliability - there is a HUGE difference in minimum reliability standards between a gaming laptop and a MBP - although the Lenovo, Dell and HP workstations have to be as reliable as the MBP). I don't have actual sales figures, but just judging by the number I see around, I'm guessing even the big 15" MBP outsells every other $1500+ laptop by 10 to 1 or more (how many Razers or Lenovo workstations do you really see)? The 13" outsells the 15" by a factor of 3 or 4 again!
An example of where Apple's scale is critical is the discussion on another thread of the Nvidia Max-Q binned GPUs. Aside from the fact that Apple won't use Nvidia because Final Cut loves AMD, and Apple has no interest in helping Adobe (all the Adobe stuff prefers Nvidia), Apple is responsible for a huge percentage of ALL discrete laptop GPU sales on models they use, and can't use binned parts unless most parts off the line can hit the bin. Some boutique gaming manufacturers can use the binned parts, because the ones that fail the binning can go into relatively inexpensive Sagers and Clevos, while Razer or ASUS ROG is willing to pay extra for the good ones - but Apple probably outsells all of those put together, so there's no place for the average or bad parts to go.
Not so much with keyboards, but it is ENTIRELY possible that Razer or someone gets ahold of some unobtainium battery a year or two ahead of Apple coming up with quantities and reliability that meet their needs (but they'll still be saddled with Windows' battery life penalties).
Dan