Are there even any power or thermal issues to be concerned about with adding an additional 1GB of VRAM? I don't think there is, or nominal at best. Maybe space issues?
With regards to the new Razer Blade I'd be more concerned with the lack of upgradability more than anything. This will have the same issues as the rMBP 4 years down the road (at least if you apply the rMBP logic demonstrated on this board evenly to all PCs). Guess this is where we're all heading.
actually yes you have more heat because of the added vram
4 year old pc you dont upgrade, you donate, use as a back up, but you just buy another. I cant do meaningful upgrades on a 4 year old desktop, why would I waste money on a notebook?
lets go the desktop breakdown
a 2009 desktop would net you a core 2 duo, a AM2+ phenom 2 or if you got the AM3 that wasnt compatible with all the AMD cpus from them, or if you really splurged late 2009 a Nehalem i7 900 series
Now cpu upgrade path? none, its only in the family, the AMD cpus are worse, since they lacked performance even if you managed to score a AM3 and compatible cpu
GPU upgrade path? very limited, you are cpu limited here, not to mention that you are probably going to need a new PSU as well
ram? most of that era used DDR2, with some boards compatible with the now considered low speed DDR3 ram (1066mhz was the norm)
Storage? thats the only thing you can really upgrade, but SSDs dont solve all the problems here
So a 4 year DESKTOP, will need to be entirely redone, with the possible exception of the storage, case and ODD if you still use it
and guess what you can change on the razer and rmbps? storage
its where we were headed for 4 years now, socket change, gpus and cpus consuming a lot of power, the change for DDR3 and the now soon change to DDR4