In my opinion, WorkSpaces is a quite impressive and unique take of Amazon on cloud computing. Amazon has attempted to give users with true personal cloud experience. It is beyond simple cloud storage. I have prepared a Windows 7 PC with freedom of whatever kind of hardware I required. The best is it as true desktop experience and is just like using physical laptop or PCs I use. I have connected remotely from different ISP networks and it worked most of the times. I am thinking of leaving my personal laptop at home and use any low spec windows tab for accessing my WorkSpace.
Amazon can totally count me in on WorkSpaces if they can address the lag / latency issues which start randomly during sessions. Second thing to be addressed is the time Amazon App takes to connect to my WorkSpace. I understand that technically it can relate to my own ISP connection but I have faced the same issue of multiple networks since I travel a lot.
Every IT professional show give WorkSpaces at least one shot. Its truly worth the time you will spent.
As tech professional heading networks & software development teams in our Company which has more than 150 employees across the globe, I see a very plausible implementation of WorkSpaces, where I will create an active directory based LAN network and they can login to their workstations regardless of their locations and type of hardware they might have. This will help me in data protection, governance, maintenance of our custom software, plus ease of access for employees.