This was a very good reason for me to sell every last satoshi i had yesterday, and it seems that was a smart choice, it's all starting to collapse now.
When the development of such a big project comes to a halt, it's time to get the f*ck out.
http, ftp, smtp, dns, DHCP (had one of the guys who developed it for CS networking class), tcp/ip, OSI (gone away) have had very few changes at the protocol level over the years. Plenty of things have been built on top of them which is where the value on the internet and web have been. There are certainly cases where they could be improved (e.g. dns, smtp), but they have been slow to have changes without having very good reasons to do so.
Similarly, I think we'll see many things built on top of the blockchain - e.g. colored coins, namecoin - and things built to extend and use bitcoin - e.g. silk road type markets, international payments etc - and that is continuing development. But it doesn't have to be changes at the tcp/ip or bitcoin protocol level to be useful.
