> I often wonder what if we decide to build a completely new, well thought out computing system (including network) that is totally separate from any legacy sys

> I often wonder what if we decide to build a completely new, well thought out computing system (including network) that is totally separate from any legacy system and 100% backwards incompatible. Not any bit less, 100% backwards compatible and everything would be fresh. There would be no jpeg support (it would have its own image format), it would not have standard TCP/IP stack - a new protocol and network infrastructure, new display format, new IO ports, etc. The iPad is probably the biggest such attempt to do most of those things. :)