Don't misunderstand. We will always need accounting, sales order processing, and HR that provide an enterprise transaction layer. But if we look at the broad view of what occurs in the business process, both with customers and across supply chain, we understand that there is more than transaction management going on.
The technology exists today and is mature and reliable to support universal search and collaborative dialogue (through collaborative and social platforms, MFT and cloud business solutions). In addition, statistically, many of the people in the enterprise never touch the ERP - it's not part of their job. And among those who do, percentages vary as to how much time they actually spend in the ERP. Other technologies such as analytics, conferencing/voice/mobile communications, and document management (proposals, contracts, and designs) also vie for management's attention.
