so is yours. your point might be "correct", but your arguments are full of errors:

"Modularity" is not something that gives an OS a big advantage. it simply says that you can enable / disable features independently from other OS features. that's neither new nor something inherently valuable. it makes deploying and managing w7 easier, but it's no big deal.
and vista is nearly as modular as w7, that wasn't a new feature in w7.

what's a "memory module" ?
seriously, don't use numbers and terms you don't understand.
a 32 bit architecture can address 2^32 adresses of memory, whereas 64 bit archs can address 2^64. try computing 64^64 for comparison... that's a number many many many orders of magnitude larger.

since one address usually corresponds to one byte, you have 2^32 bytes of ram (=4 GB) as possible maximum in 32 bit systems, minus some overhead. the possible adress space for 64 bit systems is 16 exabytes. 128 GB of ram is a practical limitation of today's systems.